I was called this morning by the BBC. It wanted me to comment on the claims that Sports direct, a chain of sports clothing shops, mistreats its workers – keeping them on zero-hours contracts, sometimes not paying them even the minimum wage, scaring them out of going sick, generally treating them like dirt. Would I care to go on air to defend the right of employers to behave in this way? I am increasingly turning down invitations to go on radio and television, and this was an invitation I declined. I suggested the researcher should call the Adam Smith Institute. This would almost certainly provide a young man to rhapsodise about the wonders of the free market. My own answer would be too complex for the average BBC presenter to understand, and I might be cut off in mid-sentence.