You're just name-calling here, it's not "silly" just because you don't like the fact. If they leave, they actually leave, period. Sweden's left-wing majority abolished the inheritance tax(!) because so many wealthy people left because of it (among them, the famous IKEA founder).
It's sad that your non-arguments and whinging are being upvoted by people who "feel" the rich ought to be taxed but refuse to think about the consequences.