im definitely interested in not collapsing the world financial system, but its a tough problem to find a solution to.
there are other assets besides stocks banks could own - loans would definitely be a much bigger part of the pie.
As for starting a business, itd make sense to only hire on people you trust at first. Afterward you have to continue to show your worth not to investors but to employees.
As an alternative to trust, you could cut your own business a loan, so that if youre ousted as long as it doesnt go tits up you still get a payout.
Well, if you want to tax billionares out of existance u need a wealth tax, aka unrealized gains.
taxing unrealized gains is just going to force individuals to sell their business to liquidate the cash to pay their taxes. Institutional traders will buy them up, so youre universally taking control out of the hands of people and giving it to banks and hedgefunds, which will just end up owning eachother.
I dont think any billionares exist that made their money in some other way than selling stocks in a business they acquired at a lower value, aside from inheritance or divorce.
Maybe you do implement a wealth tax anyway though, but you do it after abolishing stocks, just to catch the loopholes.