I feel like if you really wanted to give away your wealth, the best way to do it would just be to air drop cash to people. Trying to funnel it through a large scale charitable org is just asking for corruption and bureaucratic ienfficiency, not to mention straight up allocative efficiency because you don't know what people really want or need.

That being said, if I were that wealthy, i'd probably want a say in how my philanthropic wealth gets used, and wouldn't be so keen to just airdrop it on people