# Can Andy Burnham Rebuild Britain If the OBR Says No?

The United Kingdom faces a fundamental question about its economic future: can a government deliver large-scale national renewal when the country’s independent fiscal watchdog says the numbers don’t add up? Greater Manchester Mayor Andy Burnham believes the answer is yes—but only if Westminster changes the rules.

Burnham has emerged as one of the most vocal advocates for a new approach to British economic policy. His argument centers on a simple but controversial premise: the Office for Budget Responsibility (OBR), the UK’s official fiscal forecaster, is applying the wrong framework. By using static models that assume no economic benefit from public investment, Burnham claims, the OBR systematically undervalues the potential returns from rebuilding Britain’s infrastructure, housing, and public services.

The mayor points to a specific example: building new social housing. Under current OBR rules, the upfront cost is counted as pure government spending. The long-term savings—reduced homelessness spending, lower healthcare costs, higher productivity from better-housed workers—are not factored into the fiscal forecasts. The result, Burnham argues, is a system that makes investment look unaffordable when it might actually pay for itself over time.

This is not a fringe position. A growing number of economists, including some former OBR officials, have questioned whether the UK’s fiscal rules are too restrictive. The current framework requires debt to be falling as a share of GDP within five years. Critics say this creates a bias against long-term capital spending, because the benefits take longer to materialize than the political and fiscal cycle allows.

Burnham’s proposed solution involves a new approach to fiscal rules that would separate day-to-day government spending from investment spending. This is sometimes called “golden rule” budgeting: borrow only to invest, not to fund consumption. Many other countries, including Germany and Canada, operate under similar principles.

The political stakes are high. With a general election approaching, the Labour Party has promised to “get Britain building again.” But if the OBR continues to score such plans as unaffordable, the next government may face the same constraints that frustrated its predecessors. Burnham’s challenge to the current system is therefore not just a technical debate about accounting methods. It is a fundamental argument about whether Britain’s fiscal institutions are fit for purpose.

The mayor acknowledges that changing the rules would require political courage. The OBR was created precisely to prevent governments from manipulating economic forecasts to justify reckless spending. But Burnham insists there is a difference between fiscal discipline and fiscal paralysis. “You can be responsible without being timid,” he has said.

For now, the OBR shows no signs of changing its methodology. Its mandate is to provide independent forecasts based on current government policy, not to model hypothetical future benefits from unannounced investments. The ball, therefore, remains in the politicians’ court. If Burnham and his allies want to rebuild Britain, they must first convince voters—and the markets—that a new set of fiscal rules can be both ambitious and credible.

The answer to the question “can Andy Burnham rebuild Britain if the OBR says no?” may ultimately depend on whether the country is willing to trust a new economic playbook. The old one, by almost any measure, is not delivering the growth the nation needs.