Why not the USA then? As bad as it is here, we probably have LOWER top rate earnings than the UK.
Or are the French Bankers expecting an Obama victory??
If they spend ~7 months a year in the UK then they will pay only 45% tax - and they still get to visit their native country by train.
If Concorde was still running then you might have seen some French expatriates.
I suspect the quick travel back “home” and not involving TSA is part of the appeal. And they likely will continue doing business in Europe while staying closer in time zones.