Professional Boundary Instantiation: How Health Systems Create Workforce Scarcity

Why workforce reform is slow, partial, and sometimes reversible — a structural account of professional boundary instantiation

Introduction

1. The reform paradox

Health workforce reform is difficult. Anyone who has worked in this field for more than a few years will recognise the pattern: a problem is identified, a review is commissioned, recommendations are made and implementation begins. Then, some years later, a new report identifies much the same problem, supported by much the same evidence.

This is not a reason for pessimism, nor is it a criticism of the people involved. Most workforce reform is led by capable people, informed by good evidence and driven by a genuine commitment to improve healthcare. Some reforms do produce lasting change. Pharmacist vaccination is a recent example. The long professionalisation of nursing is another. Some expansions of allied health scope have also become firmly established.

As discussed in Section 4, these reforms tend to have something important in common: they changed several parts of the system at around the same time. Education, regulation, employment arrangements and funding were brought into sufficient alignment to support the new way of working.

More commonly, reform changes only one part of the system while the others remain in place. This can lead to three outcomes.

1. The reform may be achieved formally but have little practical effect. A profession may gain new authority, for example, while employment classifications or funding arrangements continue to prevent practitioners from using it.
2. The point of resistance may simply move. A regulatory barrier may be removed, but the same dispute then reappears through funding rules, credentialing requirements or workplace policies.
3. Real change may occur, but only very slowly. Progress is made through a series of partial reforms over many years, without the different parts of the system ever becoming fully aligned.

Across thirty years of working on these issues, I have repeatedly encountered these patterns. What has been missing is a structural explanation for why they recur — and, therefore, a way of designing reform that anticipates them rather than discovering them after implementation has begun.

Two Australian scope-of-practice reviews illustrate the problem.

In 2013, a Queensland Ministerial Taskforce found that legislative, administrative, policy and traditional barriers were preventing allied health professionals from working to their full scope. It recommended action across regulation, funding and education.

More than a decade later, the 2024 national Unleashing the Potential Scope of Practice Review reached a strikingly similar conclusion. Drawing on evidence from every Australian jurisdiction and more than 1,300 published studies, it found that almost all primary care professions continued to face restrictions that were not explained by their education or competence.

The two reviews differed in scale, but their underlying diagnosis was much the same. So were many of their proposed directions for reform.

The barriers identified in the earlier review did not necessarily persist because its recommendations were ignored. They persisted because changing one part of the system was not enough. The existing division of work continued to be reinforced through the parts of the system that remained unchanged.

This is the reform paradox: health systems repeatedly recognise that qualified practitioners are being prevented from using their capabilities, yet reforms often leave intact the structures that produce those restrictions.

The same pattern appears beyond scope of practice. It can be seen in industrial agreements that improve conditions while preserving outdated professional silos; workforce plans that model supply and demand using classifications that no longer reflect the work being performed; and funding reforms that change the price of a service without changing which practitioners are recognised or paid to provide it.

These are not simply political or implementation problems. They reflect the way professional work has been built into the structures of the health system. This working paper offers a framework for understanding that structure — and for designing reforms that have a better chance of changing what happens in practice.

2. What is professional boundary instantiation?

The core idea is straightforward, even if its consequences are not.

When a profession establishes itself — through training, registration, industrial recognition, and funding — it does not simply acquire market presence. It encodes its boundaries into the institutional fabric of the systems around it. Those boundaries become facts about the system, not just facts about the profession. They appear in education curricula, in regulatory statutes, in the classification descriptors of industrial awards, and in the fee schedules of funding systems.

At that point, the boundary is no longer a professional claim that must be actively defended. It is an institutional fact that the system enforces on the profession’s behalf — whether or not anyone in the profession is still actively defending it, and whether or not the original claim still reflects clinical reality.

This process is what this paper terms professional boundary instantiation. Instantiation is borrowed from computing: an instance is a specific, concrete realisation of an abstract concept. A profession is instantiated when its jurisdictional claims — what it does, who is qualified to do it, what it is worth — are realised in specific, concrete institutional forms. Not just claimed, but encoded. Not just advocated, but enforced.

Once a profession is instantiated, its boundaries persist not because the profession is actively protecting them, but because the institutions that encoded them are doing so automatically.

The award enforces the classification. The register enforces the scope. The funding schedule enforces the price. None of these enforcement mechanisms requires ongoing professional mobilisation. They simply operate.

This structural property has consequences that go beyond resistance to reform. The architecture does not simply hold workforce arrangements in place; it reproduces differential recognition. It encodes which work is named, which is rewarded, which is protected, and which remains structurally invisible — regardless of the clinical contribution being made or the populations being served. What follows from professional boundary instantiation is therefore not only institutional inertia, but the steady reproduction of unequal legitimacy and value across occupational lines. The four mechanisms described in the next section are the means by which this reproduction occurs.

3. The four mechanisms

Professional boundary instantiation operates through four distinct mechanisms, each encoding professional boundaries in a different institutional domain.

3.1  Curriculum instantiation

Before a profession is regulated, before it is industrially recognised, before it is funded, its boundary is taught. Students entering a professional education programme learn not only the knowledge and skills of their profession — they learn where the profession’s boundary lies, and why that boundary reflects the nature of professional knowledge rather than the history of jurisdictional negotiation.

This is curriculum instantiation performing its most important function: producing practitioners whose professional identity is constituted by the boundary. A physiotherapist taught in first year that manual therapy belongs to physiotherapy does not experience that belief as an ideological position. They experience it as clinical knowledge. When someone challenges the boundary, they challenge an identity, not merely an interest.

The circularity of curriculum instantiation is its most durable property. Professions typically control or substantially influence the accreditation of their own educational programmes. The body that defines the scope of practice also accredits the programmes that teach that scope. Graduates of accredited programmes acquire the credential required for registration. Registration is required for employment. The circle is closed before any external actor can intervene.

The curriculum mechanism is not only architecturally consequential. It is also strategically deployable: holders of operational levers within curriculum architectures can use those levers to project influence into industrial, regulatory, and fiscal outcomes without entering those mechanisms formally.

3.2  Regulatory instantiation

The second mechanism converts what the curriculum has established as professional knowledge into what the state enforces as state-sanctioned authority. Registration requirements, scope of practice definitions, and licensure conditions transform professional claims into legal facts. In some contexts, performing tasks within a registered profession’s scope without authorisation is unlawful. Operating outside the registration threshold typically disqualifies a practitioner from the industrial and funding structures that follow.

In Australia, the Australian Health Practitioner Regulation Agency (Ahpra) registration system makes the regulatory threshold structurally visible. Allied health occupations without Ahpra registration — exercise physiology, art therapy, music therapy, and others with established educational programmes, genuine clinical roles, and in some cases stronger outcome evidence than registered equivalents. These professions are not absent from the health system. They are relatively disadvantaged across any mechanism that follows registration where the industrial, fiscal, and in some cases curriculum mechanisms were built with the registered profession as their primary reference point. Ahpra registration is the threshold at which the other mechanisms engage, and operating below it means operating with reduced leverage across all of them simultaneously. The NDIS pricing case, described in more detail in section 5 illustrates this in practice for the music and art therapy professions.

3.3  Industrial instantiation

Professional boundaries are also embedded in the structures through which people are employed, classified, authorised and paid.

Industrial instantiation does not usually make it unlawful for a practitioner to undertake particular work. Instead, it determines whether an employer creates a recognised and supported way for them to do it. A practitioner may be appropriately qualified and legally permitted to perform an activity, but still lack an approved role, suitable classification, organisational credentialling, clear accountability arrangements, or recognition through pay and career progression.

Position descriptions, awards, classification systems, workforce models and local governance arrangements therefore shape which capabilities can be used in practice and how that work is valued.

King and colleagues’ study of diabetes educators provides a clear example. Practitioners from several professions could obtain the same specialist credential, yet diabetes educator positions were often established as nursing roles. The boundary was not primarily created by law, but through the way employers designed jobs and career pathways. Industrial instantiation operates through both formal instruments and informal conventions of job design; the diabetes educator case in Section 5 develops this distinction.

Industrial instantiation therefore determines not only who is supported to do the work, but whether comparable work is recognised and valued consistently, regardless of who performs it.

[Read the full diabetes educator case study]

3.4  Fiscal instantiation

The fourth mechanism encodes professional boundaries in funding systems — Medicare Benefits Schedule item numbers, NDIS Price Guide tiers, Australian National Aged Care Funding Guide, public hospital funding formulas. Fiscal instantiation converts what regulatory and industrial mechanisms have established as professional recognition into what the funding system will pay for.

The NDIS Price Guide is the starkest current example of fiscal instantiation in the Australian context. The Guide assigns therapists to pricing tiers using Ahpra registration as the primary eligibility criterion — not clinical evidence, not demonstrated outcomes, not the characteristics of the work performed (e.g. see the NDIS Independent review into art and music supports). A profession registered under AHPRA accesses the higher tier; a profession without registration accesses the lower tier or is excluded entirely. The fiscal mechanism is not applying a neutral evidence standard (nor is the standard applied consistently). It is enforcing the regulatory boundary as a fiscal fact. Section 5 develops this case in detail, and shows that on close examination the operative criterion is not regulatory status as such, but institutional consolidation.

3.5  The instantiation gradient

The depth of instantiation varies across workforce groups in ways that directly predict where reform will succeed and where it will be absorbed. Medical specialties represent the benchmark for full instantiation: curriculum accreditation controlled by the colleges, statutory registration with protected scopes of practice, enterprise agreements that encode specialist classification structures, and Medicare item numbers pricing specialist services at rates unavailable to other practitioners. Reform of medical specialist boundaries must work against all four mechanisms simultaneously — which is why it is so rarely attempted and so rarely sustained when attempted.

Allied health sits in the middle of the gradient. Most Ahpra-registered professions are strongly instantiated across curriculum and regulatory mechanisms, but industrial and fiscal instantiation varies considerably across jurisdictions, professions, and care settings. This partial instantiation is precisely where reform has had its occasional successes — and explains why those successes tend to be jurisdictionally bounded and difficult to generalise.

The support and assistant workforce sits at the shallow end: minimal curriculum instantiation with no accreditation requirement tied to a registration threshold, no registration boundary, generic industrial classification under support worker or health assistant categories regardless of the work performed, and fiscal pricing that reflects support worker rates irrespective of the complexity of clinical contribution. This minimal instantiation means the support workforce is both the most flexible and the most structurally invisible — able to absorb redistributed tasks without industrial resistance, but unable to gain recognition for doing so.

The gradient matters for reform strategy. Where instantiation is shallow, reform is tractable — one or two mechanisms, not four. Where all four are fully engaged, only coordinated multi-mechanism action holds. Understanding where a workforce sits on this gradient is the first diagnostic step in deciding what kind of reform is feasible. It is also the first diagnostic step in seeing what the architecture is doing distributionally: which workforces are encoded into visibility and which are held below the threshold at which the system recognises their work at all.

3.6 Three cross-mechanism dynamics

The four mechanisms do more than reinforce professional boundaries. Their interaction produces recurring patterns in how professional work is recognised, valued and protected across institutions. Three dynamics are particularly important: institutional divergence, instantiation cascades and boundary insulation.

Institutional divergence

Institutional divergence occurs when different mechanisms assign inconsistent forms or levels of recognition to the same profession or body of work.

A profession may, for example, receive strong curriculum recognition through a postgraduate entry qualification, limited regulatory recognition because it is not statutorily registered, lower fiscal recognition within a funding schedule, and no distinctive industrial recognition within a shared classification structure. The profession and the work have not changed between these settings. What changes is the institutional proxy used to value them.

Music Therapy and Art Therapy provide a clear example. Their postgraduate qualifications are recognised industrially under the federal Health Professionals and Support Services Award, while their absence from national statutory registration has been used to justify a lower NDIS pricing category. Within most state health awards, the same postgraduate entry requirements do not produce a distinct classification outcome.

Institutional divergence demonstrates that curriculum, regulation, industrial classification and funding are not interchangeable measures of work value. Each mechanism recognises a different aspect of institutional position, and the resulting valuations need not be coherent.

Instantiation cascades

An instantiation cascade occurs when recognition secured through one mechanism travels into others and becomes progressively reinforced.

An educational distinction may acquire regulatory recognition through a protected endorsement or credential. That regulatory distinction may then support a separate industrial classification, which may in turn attract differential recognition through a funding system. Each additional form of recognition makes the original distinction more visible, legitimate and durable.

Clinical Psychology illustrates this pattern. A postgraduate clinical pathway is recognised through area-of-practice endorsement, separate industrial classification and differential fiscal recognition. The analytical point is not that each stage necessarily follows automatically from the one before it. It is that recognition established in one mechanism can create the institutional basis from which recognition is sought and secured in others.

Instantiation cascades help explain why relatively small differences in the historical development of professions can produce substantial differences in their contemporary visibility, authority, remuneration and access to funding.

Boundary insulation

Boundary insulation occurs when a profession remains outside shared evaluative instruments and retains profession-specific arrangements for negotiating remuneration, authority and status.

Separate arrangements may reflect legitimate differences in scope, qualification, labour-market conditions or responsibility. They also prevent the profession’s work from being fully evaluated through the common methods applied to surrounding occupations. The boundary of the evaluative instrument therefore becomes part of the architecture through which professional hierarchy is maintained.

Medicine and Dentistry provide the clearest examples. Both remain outside several shared industrial and job-evaluation structures applying to surrounding health workforces. Their exclusion does not establish that their work is overvalued or that surrounding work is equivalent. It means that the relative position of the professions has not been determined through a common evaluative process.

Boundary insulation can therefore preserve historical professional settlements around the perimeter of otherwise shared reforms. A common framework may improve consistency among the occupations it covers while leaving the wider hierarchy between included and excluded professions substantially intact.

These three dynamics describe the ordinary operation of the four-mechanism architecture. Institutional divergence produces inconsistent recognition; instantiation cascades allow recognition and advantage to accumulate; and boundary insulation preserves separate professional settlements outside common evaluation. The next section turns to a different question: what happens when reform attempts to change that architecture.

4. The four-legged stool: three patterns of reform outcome

The previous section identified three dynamics produced through the ordinary interaction of the four mechanisms: institutional divergence, instantiation cascades and boundary insulation. This section turns from the operation of the architecture to its response when reform is attempted.

The four mechanisms do not operate independently. Each encodes, legitimises and reinforces what the others have established. When reform changes one or more mechanisms, that mutual reinforcement produces three distinct patterns of outcome: reform absorption, contest relocation and durable multi-mechanism reform.

• Curriculum instantiation produces practitioners whose identity constitutes the boundary, providing the cultural substrate through which regulatory, industrial, and fiscal instantiation are experienced as legitimate.
• Regulatory instantiation legitimises the credential that curriculum produces, providing the legal basis for industrial and fiscal differentiation.
• Industrial instantiation encodes what regulatory instantiation has established as an employment obligation — making boundary maintenance a contractual requirement, not merely a professional preference.
• Fiscal instantiation reinforces what industrial instantiation has established by making boundary maintenance economically rational at the system level.

This mutual reinforcement is the four-legged stool. It is not a metaphor for stability in the abstract. It is an explanation for why the stool is so hard to overturn — and why reform attempts produce three distinct outcome patterns, only one of which is durable success.

Mutual reinforcement is the passive face of the architecture. There is also an active face: holders of operational levers within one mechanism can deploy those levers strategically to project power into the others when reform attempts threaten the prevailing settlement. The four-legged stool does not only sit; it can also push back.

4.1  Reform absorption

The most common outcome of single-mechanism reform is absorption. The reformed mechanism encounters a system in which everything else still encodes the old settlement. The reformed instrument is technically in force; the unreformed instruments continue to do their work. Over time, the reformed mechanism tends to drift back toward alignment with the unreformed ones — not through bad faith, but through the ordinary functioning of institutions that were never reformed.

Reform that addresses one mechanism is absorbed by the three that remain unreformed. Each unreformed mechanism continues to encode the pre-reform settlement, producing practitioners whose identities reflect the old boundary, enforcing the old scope of practice, paying the old classification rates, reimbursing the old professional tier.

Reform absorption can be seen, although less completely, in the removal of mandatory collaborative arrangements for Australian nurse practitioners and eligible midwives. From 1 November 2024, the legal requirement for medical practitioner involvement as a condition of access to MBS rebates and PBS subsidies was removed. However, the reform did not itself replace the wider MBS and PBS architecture governing which services nurse practitioners could bill and which subsidised medicines they could prescribe. Those settings remained subject to separate item schedules and review processes. Other reforms increased nurse practitioner rebates and progressively expanded MBS and PBS access, but these occurred through distinct processes and on different timelines.

The case therefore illustrates the bounded reach of reform across dispersed mechanisms rather than complete fiscal inertia. Regulatory autonomy increased immediately, while fiscal recognition continued to develop incrementally through separate decisions. The practical effect of the regulatory reform remained partly shaped by the services and medicines the funding architecture separately recognised.

Reform absorption is not a failure of implementation. It is a predictable structural consequence of partial reform in a multi-mechanism system.

4.2  Structural redistribution: contest relocation

A second pattern is distinct from absorption and equally important. Where reform succeeds at one mechanism but the others remain unchanged, the underlying jurisdictional contest does not cease. It relocates to whichever mechanism remains available as a venue.

Podiatric surgery in the United Kingdom illustrates the dynamic across more than half a century. The contest over whether surgery on the foot should be governed by medicine or by an emerging podiatric surgery profession was first pursued through curriculum (preventing the development of dedicated training pathways), then through regulation (challenging the legitimacy of HCPC annotation, achieved in 2020), then through industrial recognition (contesting NHS service integration), and most recently through title (whether ‘podiatric surgeon’ should be permitted) and through the institutional locus of regulatory oversight. Each successive relocation has targeted a different mechanism. The underlying claim has not been resolved — it has migrated. Substantial clinical evidence accumulated over five decades has not closed the contest, because the contest is not, on close examination, primarily about clinical evidence. It is about which mechanism encodes the boundary.

Structural redistribution is theoretically distinct from incomplete reform. The framework predicts that fully determined and fully resourced single-mechanism reform will, by structural necessity, produce contest relocation rather than contest resolution. The contest cannot be resolved by intervention in a single mechanism because the underlying architecture remains available as a venue for its continuation.

4.3  Durable multi-mechanism reform

The third pattern is durable success, and it is the rarest of the three. Durable reform requires coordinated action across all four mechanisms within a window of political opportunity narrow enough that the reformed mechanisms align before any one of them has time to drift back toward the unreformed others.

The pharmacist vaccination case illustrates what durable multi-mechanism reform looks like — and how rare it is. Extending pharmacist vaccination rights required simultaneous action across all four mechanisms: curriculum was updated to train pharmacists in vaccination protocols; regulatory scope was extended to authorise vaccination as a pharmacist activity; industrial instruments were updated to recognise vaccination within pharmacist remit; and fiscal recognition followed through public funding and reimbursement mechanisms. Because all four mechanisms were reformed together, the change held. The boundary shifted durably. Pharmacists in Australia now vaccinate at scale, the public has accepted the redistribution, and no serious effort to roll the reform back has gained traction.

What is striking about the pharmacist vaccination case is how unusual its enabling conditions were. The COVID-19 pandemic created a window in which curriculum, regulatory, industrial, and fiscal authorities could coordinate at unusual speed because the political consequences of failing to coordinate were immediate and visible. In ordinary times, the four mechanisms are governed by different bodies on different timescales — the structural feature that explains why durable multi-mechanism reform is rare. The pharmacist vaccination case is the exception that demonstrates the rule.

The three patterns — absorption, relocation, durable success — are not just descriptions of what happens to reform proposals. They are diagnostic categories. Identifying which pattern a proposed reform is likely to produce, before it is implemented, is what an architectural analysis of reform makes possible.

5. Worked examples

The framework named above is a diagnostic apparatus, not a self-evident structure. Its analytical work becomes visible when applied. The two worked examples that follow develop the framework at depth across different aspects of contemporary Australian workforce architecture. Each is a standalone document, available on the HealthWorX Futures website, designed to be read as a complete diagnostic in its own right. The examples are not exhaustive — the framework is generative, and each new case extends both its empirical reach and its analytical precision.

For workforce planners

Workforce plans built on existing classification structures will produce precise answers to the wrong questions. If the classification system does not accurately reflect the work being performed, modelling supply and demand within those categories will not reveal the true nature of the workforce problem. The diagnostic question — does the architecture see the work being performed? — must precede the planning question.

For industrial negotiators

Industrial instruments that encode professional boundaries as classification descriptors are encoding the past. Every new instrument negotiated around professional silos rather than functional work descriptions will reproduce the current failure pattern for the duration of its operation. The question to ask of any proposed instrument is not only whether it is legally sound — it is whether it will still accurately describe the work being performed in five years. An instrument designed around functional work descriptions — what work is performed, at what level of complexity, with what degree of autonomy and responsibility — can accommodate workforce change without requiring full renegotiation every time the work evolves. This is a design choice, and it is available at the negotiating table.

For government policymakers

No single policy lever controls the four-mechanism system. Regulatory reform leaves industrial and fiscal mechanisms unchanged. Funding reform leaves regulatory and curriculum mechanisms unchanged. Effective reform must act across all four mechanisms simultaneously, which requires cross-portfolio coordination that most governance systems are not structured to deliver.

The case for a permanent workforce architecture function — an institutional capability, not a reform project — rests on exactly this argument.

The government’s unique position is that it is the only actor with leverage across all four instantiation mechanisms simultaneously: it funds the universities (curriculum), administers the registration boards (regulatory), sets the bargaining framework (industrial), and controls the funding schedules (fiscal). The coordinated reform that no single sector actor can achieve is precisely what government is positioned to lead — if it can see the architecture it is governing.

For professional bodies

Professions that have successfully instantiated their boundaries across all four mechanisms have created durable recognition for their members. They have also created the conditions for the artificial scarcity, access failure, and funding distortion described in the cases above. As AI tools, extended scope practice, and system-level pressure accelerate boundary challenges across every mechanism simultaneously, professions that have relied on instantiation for protection will find that the same mechanisms which protected them now constrain their capacity to adapt. The most resilient professional strategy in this environment is not deeper instantiation — it is building genuine clinical authority that does not depend on institutional encoding to survive.

7. Conclusion

The reform paradox is real. Evidence-based, well-resourced, politically supported workforce reform frequently fails to produce the lasting change its proponents anticipate, or produces change that is partial, slow, and sometimes reversible. This paper has argued that the explanation is structural: professional boundary instantiation is the mechanism by which professional settlements become institutional facts, maintained by systems that no longer require professional mobilisation to enforce them.

Once encoded across all four mechanisms, boundaries persist until all four are reformed simultaneously — or until the mechanisms themselves are redesigned. Partial reform is not ineffective because it is partial. It is ineffective because the unreformed mechanisms are not passive. They continue encoding what the reformed mechanism was trying to change. Where they cannot prevent reform at one mechanism, they often relocate the contest to another. Some reforms do hold; the conditions under which they do are coordinated multi-mechanism action within a window of unusual political alignment.

But the deeper contribution of the framework is not the diagnosis of why reform fails. It is the description of what the architecture is doing when reform is not in motion. Workforce systems do not merely resist change. They continuously reproduce unequal recognition and legitimacy through institutional design — encoding which forms of work are visible, which are fundable, which are protected by industrial instruments, and which remain structurally invisible regardless of clinical contribution or the populations served.

Seen this way, access inequity, occupational inequality, and the differential valuation of comparable work are not failures of the architecture. They are its outputs. The art therapist paid less than the social worker performing equivalent NDIS work; the support worker absorbing redistributed clinical complexity without recognition; the rural community without dermatological access while metropolitan cosmetic clinics operate at margin — these are not loose ends in an otherwise well-functioning system. They are what the four-mechanism architecture produces when it operates as designed.

Seeing this structure does not immediately resolve the difficulty of acting on it. Multi-mechanism reform is politically complex, institutionally demanding, and slow. But it is the only reform that holds — and the stakes of holding it are not only administrative efficiency but the steady reproduction or interruption of institutionalised inequality.

The first step is naming what is happening. Professional boundary instantiation is the mechanism by which professional settlements become institutional facts. The four-legged stool is the structure that makes them durable. The reform paradox is what happens when we address a leg without examining the stool. Structural redistribution is what happens when we successfully detach one leg only to find the contest reattaching at another. And differential recognition is what the stool produces continuously, in the spaces between reform episodes, regardless of whether anyone is looking. That unequal recognition is reproduced through institutional divergence, accumulated through instantiation cascades and protected through boundary insulation.

Until the architecture is the object of reform rather than the context in which reform occurs, workforce systems will continue to produce the same patterns — and the patients, workers, and communities who depend on those systems will continue to bear the cost.