The basic problem isn't so much having a standard distribution of rich and poor (a large bump in the middle with tails on either side), what's happening now is we are trending towards having a big pile of poor people, relatively speaking who are wage slaves and can't afford basics like rent and health care, and another much smaller pile of rich people who could give fuck all about everyone else. Our system works pretty well when the rich are slightly have mores (slightly better house, car, etc) but when they just cleave off of the rest of society, there isn't a good outcome to be had there.