Two points to counter what you said here.
First, Harris Rosen put a program in place for a neighborhood and changed the lives of a generation in a generation. He had enough money after to do it again.
Second, while $2000 USD is nice for you, but goes quick, there are 6 countries in 2025 where that is at least 4 years' of median income, and about 67 (!) where that is at least a year's median income. That $500M Elon blew trying to subvert democracy could have given 250k people enough security to actually try to change their lives for the better instead of just surviving.
Carefully targeted funding can make a difference in nations with a high cost of living, and can impact even more people while requiring less discrimination in areas with a lower cost of living.