The cases you're talking about are all delaying taxation, not eliminating it. Eventually someone has to draw that wealth - the foundation has to spend for public benefit to be eligible for 501(c)3 status, for instance.
How Elon Musk's secretive foundation hands out his billions - https://www.theguardian.com/technology/2019/jan/23/how-elon-... - January 23rd, 2019
"Spending for the public benefit" has a lot of latitude.
How Elon Musk's secretive foundation hands out his billions - https://www.theguardian.com/technology/2019/jan/23/how-elon-... - January 23rd, 2019
"Spending for the public benefit" has a lot of latitude.