> there is no ethical way to get a billion dollars.
I don't buy that at all. One ethical way is to marry someone random who later becomes a billionnaire. Another is to eg create Bitcoin. And I suspect there are ethical ways to create a business that earns a whole lot of money.
What unethical things did Yvon Chouinard do to get his billions? Chuck Feeney? What about Mackenzie Scott (formerly Bezos)? Hansjörg Wyss? Craig Newmark of Craigslist?