@evan given it's nigh on impossible to renounce US citizenship and stop paying taxes.
The argument is that the rich would flee the country.
To which I ask, for where?
The Emirates? Where citizenship is bought and can be removed at the whim of a royal? To China, where the Politburo understands you keep the rich on the shortest of leashes? To the UK, who opened their doors to Russian gangsters who shiv, poison, and defenestrate?