Political instability has become one of the defining characteristics of modern governance and its effects are increasingly visible across public services, economic development and institutional delivery.
In the UK, the debate is often framed around changes in Prime Ministers and electoral cycles. But that lens is too narrow. The deeper story is not simply political change, which is a normal feature of democracy, but the increasing velocity of that change and what it means for the state’s ability to deliver sustained reform.
Churn in departments of the UK state
Between 1979 and 2016 the UK had five Prime Ministers across thirty-seven years. Since 2016 it has had six in roughly a decade. That acceleration at the top matters, but it is only the surface expression of a wider pattern running through Whitehall.
- Health and Social Care
Nowhere is this clearer than in the Department of Health and Social Care. Since 2018 it has had six Secretaries of State: Jeremy Hunt, Matt Hancock, Sajid Javid, Steve Barclay, Victoria Atkins and Wes Streeting. This period covered the pandemic, NHS recovery, workforce pressures, record waiting lists, and continuing debate on social care. These are structural issues that require sustained direction over time, yet leadership changed repeatedly while the system attempted continuity.
- Education
Education tells a similar story. Since 2016 the department has moved through seven Secretaries of State: Justine Greening, Damian Hinds, Gavin Williamson, Nadhim Zahawi, Kit Malthouse, Gillian Keegan and Bridget Phillipson. This coincided with academisation, curriculum reform, technical education change, skills policy, and pandemic disruption. Education reform is inherently cumulative: decisions taken in one cycle only fully mature years later, shaping entire cohorts. Political leadership, however, has moved far more quickly.
- Transport
Transport illustrates the tension in a different way because infrastructure is inherently resistant to political time. Since 2016 leadership has passed through Patrick McLoughlin, Chris Grayling, Grant Shapps, Anne-Marie Trevelyan, Mark Harper, Louise Haigh and Heidi Alexander. During this period government pursued HS2, Northern Powerhouse Rail, rail restructuring, bus reform, decarbonisation, and electric vehicle transition. These programmes are measured in decades. Ministerial tenure is not.
- Housing and Local Government
Housing and local government perhaps show the most complete picture because instability has extended beyond personnel into structure. The department has shifted from Communities and Local Government to the Ministry of Housing, Communities and Local Government, then to the Department for Levelling Up, Housing and Communities, and is now returning to its previous form. Alongside this, there have been more than a dozen housing ministers since 2010, while responsibility has stretched across housing supply, planning reform, regeneration, devolution and levelling up. These are slow-burn systems in which outcomes are only visible over extended periods, yet governance has been repeatedly reconfigured around them.
Churn: the effects of rapid political and administrative change
The challenge here is not that change occurs. Change is essential in democratic systems. The issue is that in some of the most complex areas of policy, leadership and institutional architecture now change so frequently that they begin to shape the character of delivery itself.
These systems do not reset on a political timetable. The NHS does not restart every few years. Education does not reorganise itself around ministerial tenure. Infrastructure does not respond to electoral cycles. Housing markets do not adjust to departmental branding. Yet the governance structures around them increasingly do.
That creates a subtle but important shift. Departments begin to operate in anticipation of change rather than in pursuit of completion. Officials become skilled in managing transition rather than embedding reform. Programmes are launched under one strategic framing, paused under another, and reinterpreted under a third. Over time, policy becomes less about delivery and more about navigation.
This is not a critique of individual ministers, many of whom operate under intense pressure and often inherit difficult conditions. Nor is it an argument against political change, which is fundamental to democratic accountability.
Churn: the cumulative effect still matters
When leadership changes frequently in systems that require sustained implementation, continuity is pushed downwards. Civil servants, arm’s-length bodies, local government, and delivery organisations become the carriers of institutional memory. They maintain the thread of reform while political leadership changes above them.
And that memory is not unlimited. It degrades through repetition. Relationships reset. Context is lost. Lessons are relearned rather than built upon. The same policy terrain is often revisited, but under different language and assumptions.
This is why the issue is not simply turnover at the top. It is whether the pace of change across the system has begun to exceed the capacity of that system to absorb it.
Churn: supplementary pressures
In the UK, this can sometimes be explained away as a recent phase of political turbulence. But that risks missing a wider structural shift affecting many advanced democracies. Electoral volatility has increased. Traditional party loyalties have weakened. Coalition and minority governments are more common. Trust in political institutions has declined. At the same time, expectations of government have risen, particularly around responsiveness to complex economic and social challenges.
These pressures sit alongside global conditions that are themselves long term and increasingly demanding: climate transition, energy security, demographic change, technological disruption, housing pressure, and geopolitical instability. The result is a growing mismatch between the nature of the challenges and the rhythm of political decision-making.
Churn: implications for government policy
The policy horizon is lengthening while the political horizon is shortening. That helps explain why churn matters. It is not just that individuals change. It is that the environment in which policy is designed, implemented and adjusted has become more fluid. And that fluidity alters behaviour.
Governments prioritise what can be delivered quickly over what requires sustained investment. Departments become cautious about long-term commitments that may be re-shaped by successors. Institutional energy shifts towards managing transitions rather than embedding reform. Policy itself shortens in response to political reality.
The result is a structural tension rather than an episodic problem.
If the defining challenges of government now require long-term continuity, but the political system operates through short-term cycles of leadership and pressure, then the question is no longer simply how change is managed. It is whether it is still being held together long enough to succeed.
Continuity and change; the tensions in policy making
There are arguments against this line of thinking. Some will suggest that institutional churn is the price of democratic responsiveness, and that attempts to protect continuity risk weakening accountability or entrenching policy failure. That is a legitimate concern. Stability without accountability carries its own risks.
But it does not resolve the underlying tension. Because even accepting that change is necessary, it does not follow that constant reset is benign.
Which brings the argument to a more fundamental point. Are there areas of government where continuity should be treated as a policy objective in its own right? Not continuity that removes political choice. But continuity that recognises that some forms of change only succeed if they are allowed to endure. Because the challenge for modern democracies may no longer simply be how to create change.
It may be how to sustain it long enough for it to matter. And in an era increasingly defined by churn, that question is becoming harder to avoid.
