Imaginary mobility. The rich are more stuck in their country than anyone. Poor people can pack their bag and leave, the middle class is slightly less mobile and the rich are stuck where they are. The drive to leave the country, the suffering, when you cant find work and/or cant pay your bills and/or cant buy food is endlessly larger than "suffering" taxes. The UK is a profitable environment and the country isn't shitty enough to just run away - it's quite fine and dandy actually.

But all that is besides the point really.

It is preferable to have successful people who move towards things. People trying to move away from things are useless regardless how much money they have. They are beyond useless! Who needs them with there unambitious greed? What good will come from them? As you describe, all they care about is themselves? Their money will do nothing but build the next rent seeking scheme simply to take it away.

We should really buy them a large cruise ship and give them a going away party. Ill be standing there waving until she vanishes over the horizon. Then ill softly whisper: Goodbye angry men, may you find greener pastures elsewhere.