Thoughts on rich people not donating money

A few days ago my sister said there was this rich guy not donating his money or something like that. I said, "Who cares? It's his money. He can do whatever he wants to do with it. If he doesn't want to donate then he doesn't need to."
What do you guys think?
If I was rich I'd probably donate some of my money but I'm not so I don't donate money. My mom donates my families old clothes that still look good. I'm totally for donating my old clothes that I don't use anymore.