1) some people are rich and want to get richer
2) Ivy educated VCs invest money for group (1) in start-up companies, while paying themselves handsomely with that same pool of money
3) Ivy educated kids start companies using money from group (2), while paying themselves handsomely with that same pool of money
4) sometimes, through a combo of hard work, skill and luck, things work out and everyone makes more money than was spent
5) sometimes, because they are mostly, actually a bunch of yahoos and/or scammers, things don't work out and group (1) loses their money
There are some oversimplifications here, but in general, this seems to be the way.