lol.

People who move because of this are the ones with small portable fortunes.  The real rich in France are those that gain huge incomes from companies and property.  The companies can't move because they have a symbiotic relationship with the state (French diplomats often seem to work as salesmen for infrastructure and arms companies) and of course property owners can't move either.

We may disagree with taxing the rich as opposed to raising tax on the lower orders but its not stupid.