Every country would have to do it. A party here in Switzerland wanted to drastically increase inheritance tax for certain large inheritances, and the rich people threatened so hard to leave the country that everyone believed them and now nobody supports it anymore. (They said their children would not be able to pay the tax because most of their wealth is supposedly in company shares, so if they died their children would have to sell off the companies to Cineese companies which nobody in Switzerland liked to hear)