Yeah well the standard line they always trot out whenever anybody starts talking about taxing billionaires is the threat of the billionaires leaving. The thing is, if they were actually prepared to do that they wouldn’t spend all the money fighting it, they would just wait until it happened, and then leave.

Billionaires don’t really care about tax, it’s like the least expensive thing they spend money on in a year. They’ll quite happily spend 10,000 times as much on a yacht, it’s like asking an average earner if they would consider moving to get out of paying a 40 cent annual surcharge.