By that logic rich people in all the countries that have a higher tax level than the US should have either left their countries or placed all their investments overseas. Plenty of countries manage to tax the rich harder than the US without major damage to their economy.
Most rich people dont like living in exile.
Other than the fact that he keeps being PC by saying "higher-income people" rather than "rich"
Is the term rich really not PC?!
Don't bother arguing from an international perspective. The American Right isn't interested in hearing it.