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And he's actually doing it, so what's your point?

How do you know? Has he shown you his bank statements?

The information you're looking for is accessible. I don't argue with people who say Bill Gates doesn't donate much money, either.

I haven't seen Bill's bank statements, but I believe he does donate for the same reasons I believe Sam does.

Because the Gates Foundation publishes its returns? https://www.gatesfoundation.org/about/financials