Comment by cryptonector

> I always thought taxing money leaving the country might be interesting way to approach the problem.

Capital controls. By the time they are applied it's always too little, too late, and they only ever apply to the plebs -- the wealthy always have ways to move money out (and back in, later -much later-, if it becomes necessary or advantageous). Always too little too late because -I suspect- capital controls don't really work -- not against the wealthy.