Then again, whenever Buffet & his ilk make self-serving comments about how they don't pay enough taxes I wonder, "why don't you pay more?" The IRS takes donations.
I hope your train of thought proceeds to the next station along that line: “oh yeah, because that doesn’t scale, obviously.”
It’s the same reason why it’s better to sponsor a “we’ll double your donation up to $X” charity campaign, than to just donate $X directly. It attracts others in with you.