Bill Gates has stated in an interview that robots who take human jobs should pay taxes. This has some obvious attractions. Not only, as Gates says, will we be able to spend the money to finance jobs for which humans are particularly suited, such as caring for children or the elderly, but robots are also unlikely to complain about tax levels, they don’t use services financed by tax revenue such as education or the health services and they are most unlikely to salt away income and assets in a tax haven. What’s not to like?