Well, I guess that shuts me down... or not. 45 presidents, and only four didn't take their pay? Of those four, one is Donald Trump, so he should get some dayum credit for donating his salary to charity, but of course he won't.
And, of those 45, how many were wealthy? I'm going to speculate here (don't see people admit that too often on the flip, hey?) that most of them were wealthy. Maybe some did it and nobody knew?