My main issue with fleecing the rich is the opportunity cost. Say a billionaire like bill gates has 10 billion in income and pays what some (uncle bernie) want in taxes which would be 9 billion. Yes he can live easliy off 1 billion but that aint the point. The other 9 billion will not just sit there, it will be invested in some fashion. If you think the government can better allocate resources than a smart business man or the market can, I think you are delusional. The market creates and destroys wealth in the most efficient way, and if the government would just get out of the way, we'd be better off as a whole.
Also, kinda pedantic, but whens the last time a poor person gave you a job?