Merryn Somerset Webb: Reeves should cut...

Poor Rachel Reeves. She doesn’t seem to get much right – and even when she does things still seem to go wrong (see welfare reform). And so it is with her perfectly sensible thoughts on cash ISAs. All UK adults get a £20,000 ISA allowance – which they can pop into a tax-free wrapper and either hold in cash or invest in the equity or bond markets. More than 7.8 million people have cash ISAs, around double the number who use the wrapper for investing.

Reeves had been planning to change the allowance such that a maximum of £4,000 or £5,000 could be kept in cash, with the rest having to be invested. Her public thinking was simple: over the long term, the stock market provides very significantly better returns than cash – and it makes sense for as many people as possible to take advantage of those returns. History firmly backs her up on this: in the last ten years the UK’s passion for cash ISAs has, says Schroders’ Duncan Lamont, left households more than £500 billion worse off than had they invested in global equities.