Before we get onto the budget and what Rachel Reeves might do to fiddle her fiscal rules and give herself a little more room to spend, I want you to ponder, for a moment, a recent report from the Office for Budget Responsibility (OBR).
This wasn’t one of those big OBR reports that get lots of attention – such as the documents and numbers it produces alongside each budget, full of the forecasts and analyses on the state of the economy and the public finances.
Instead, it was a chin-scratchy working paper that asked the question: if the government invests in something – say, a road or a railway, or a new school building – how long does it generally take for that investment to come good?
The answer, according to the report, was: actually quite a long time. Imagine the government spends a chunk of money – 1% of national income – on investment this year. In five years’ time that investment will only have created 0.4 per cent of GDP. In other words, in net terms, it’s costed us 0.6% of GDP.
But, and this is the important thing, look a little further off. A high-speed rail network is designed to last decades, and as those decades go on, it gradually improves people’s lives – think of the time saved by each commuter each day – small amounts each day, but they gradually mount up. So while the investment costs money in the short run, in the longer run, the benefits gradually mount.
The OBR’s calculation was that while a 1% of GDP public investment would only deliver 0.4% of GDP in five years, by the time 10 or 12 years had passed, the investment would be responsible for approaching 1% of GDP. In other words, it would have broken even. The money put in at the start would be fully earned back in benefits.
And by the time that investment was 50 years old, it would have delivered a whopping 2.5% of GDP in economic benefits. Future generations would benefit enormously – or so said the OBR’s sums.
Having laid that out, I want you now to ponder the fiscal rules
