They hold a lot of money because the more money they have the more they get as a return on investments, which becomes an exponential function of wealth and creates a fundamental disparity between those who have more and those who have less.

The only reason people “want the same thing” is because the system dictates that they should, and in fact must, there is no escaping it. Most rich psychopaths are gambling addicts, they get addicted to the money and the making of money, and it becomes an end in itself. Just like capitalism itself.