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 keep thinking a "Corporate Death Penalty" would be useful.
For anything from Coca-Cola, through the Sierra Club, Boeing Employees Credit Union to the 'Bill and Melida Gates Foundation' - any "group".
The issue is that fines are (basically by natural law!) passed to the consumer. So you can't 'punish' companies. (Other than Judical rulings that are the long list of market-screwing little things.)
If there's something sufficiently criminal (falsification of vaccine trials, say), then finding precisely who-dun-it and punishing appropriately always bogs down and wanders into the weeds. And some convenient scapegoat is tethered out for us, and the company is slapped with a fine. (Not too large mind! We don't want to hurt their competitive advantage /sarc)
Instead, treat it like a new form of 'bankruptcy' - with bankruptcy rules.
Accept as a matter of law that the executive tier "Is working together" for consideration of any RICO investigations.
The entire executive tier fired, and contracts (Golden Parachutes) all cut. (Which you can do in bankruptcy.)
Slice it into five pieces
Five "Bankruptcy Trustees" with their primary pay based on 'Futures' in their slice.
-Now- Decide how to bail the companies out if it is something that's useful. (Like an airline).