I think the term is Tax Exile, and they weren't popular in the UK either, but I'm not sure anyone cares that much anymore after countless tax evasion type scand

I think the term is Tax Exile, and they weren't popular in the UK either, but I'm not sure anyone cares that much anymore after countless tax evasion type scandals. Short of reverting to Soviet style repression I'm not sure what you can do to force the rich to stay in France if they don't want to. Politicians always target the middle class as the rich can manipulate the system to avoid paying, and the poor have nothing for the government to steal.