Stop chasing the headroom: why Britain's fiscal plans should ignore forecast noise
Headroom, the few billion pounds by which the Chancellor is forecast to meet the fiscal rules, is the wrong target. It moves with forecast noise the Treasury barely controls, so chasing it makes tax and spending policy just as noisy. Set the rules once per parliament, stick to them unless there is a genuine crisis, and let voters judge the result at the end. On 28 October, the Chancellor will present his first Budget. The run-up has followed a familiar script. A new forecast arrives, the estimated "headroom" against the fiscal rules shrinks or grows by a few billion pounds, and taxes and spending are adjusted to match. For weeks, the debate about Britain's public finances comes down to a single number. That ritual is bad economics. Tax and spending decisions should aim for stability, for a tax system that makes the UK an attractive place to invest, and for long-term fiscal sustainability, not chase every change in the outlook. That requires fiscal rules set once, at the...