Most people were scandalised by John McDonnell’s proposal to promote a four-day working week. But before we get incensed about giving people more leisure during their working life, we need to ask another question. If it really is so vital to the economy that people spend more time at work, then why does the government spend £41 billion every year (a third of the cost of the NHS) providing tax relief on pension contributions? This merely encourages older and more experienced employees to leave the workforce several years earlier than necessary.