Specifically non profits that don't provide meaningful charity. Think tanks. Billiomaire "investors" propping up leftist media.
Tax it at a Bernie rate of 70-90%. I'm fine with billionaires when they're trying to remain wealthy or invest in industry but their influence over politics needs to stop.
I agree.
Let's tax Bill Gates, Warren Buffett, Jeff Bezos, Zuckerberg, Dorsey et.al at a 90% tax rate.
The issue is that no one ends up paying any extremely high rate - even when you think you've written the law well.
Steve Jobs, for instance, had "his income" at "$1 per year" for a decade or two. Company provided house, company car, etc ... -> "No expenses even!" sorts of silliness. And very tough to write something enforceable that's concrete enough to stop this sort of thing. Yes, he had stock sales and paid taxes via other routes - but only because he wasn't under '90% taxation' rules.
The one solitary group that ends up paying the chunk of 'high rate' is spouses and children of recently deceased types with poor planning - "Losing the family farm." Anything large enough to have lawyers on staff is large enough to evade.