Tough call. I know, Bill gates could singlehandedly house all the homeless in America...
With that said.
1. Capitalism is like a casino. Most people will lose but everybody needs to feel like they have a shot at limitless riches in order for the game to continue.
2. Bill gates took a helluva entrepreneur's risk by dropping out of Harvard to start Microsoft. Likewise, Jeff Beezos started Amazon out of his garage for less money than his current job and at a risk of losing it all.
They deserve it. Amazon & Microsoft have facilitated in the making of so many more millionaires, and have helped feed thousands.
Normally, you get rich by enriching others.