What?
Also, donating appreciated stock avoids taxes. This donation may have come out of a donor-advised fund.
Rich people can make substantial charitable donations rather easily and make a big difference. I suggest we encourage them.
About liquidity, yes most people with a million net worth actually have more than half in their house, so technically it is much harder for them to throw cash than somebody with a billion and a much smaller % of their worth in illiquid assets such as property or unlisted companies. I wish I had made this point too.