Prison works

One of the many ludicrous Liberal Democrat policies which Tories enjoyed rubbishing during the general election was their plan to send far fewer criminals to prison. But, alas, it seems that some bad ideas are infectious. Last week Ken Clarke, the new Justice Secretary, suggested that we can no longer afford to keep so many prisoners — so we should sentence fewer, and for shorter periods. Why, he asked, is the prison population twice what it was when he was at the Home Office in 1993? Isn’t it time to cut costs?

As George Osborne prepares for his budget next week, he should be wary of this false economy. Locking people up offers a very good return on the taxpayer’s investment. It may well cost £29,600 to keep someone in prison for a year. But we must set against this the fact that the average prisoner commits a remarkable 140 crimes per year before incarceration — and, according to the Home Office, the average crime costs £2,970.