NY Times debates: Should social good belong to mega wealthy philanthropists or the common voter?

What do you think of this statement: "People don't realize how wealthy people self-tax," Friess replied, when I asked whether taxes on the rich should rise. "You know, there's a fellow who was the C.E.O. of Target. In Phoenix, he's created a museum of music. He put in around $200 million of his own money. I have another friend who gave $400 million to a health facility in Nebraska or South Dakota, or someplace like that. You look at Bill Gates, just gave $750 million, I think, to fight AIDS."