but you’re fundamentally forcing them to sell off control of the company
That part is true. Billionaires can retain control of their company by being good leaders and providing value to the company, not because they started it 20 years ago and retained a huge amount of stock.
There is no other way. I don’t think you understand how shares of a company work. There isn’t some secret treasure chest of cash the owners have to pay that burden. They just have to sell off portions of the company because that’s what has value. This eventually results in a loss of control and dim-witted bureaucrats like the fund managers at black rock start to dictate direction.
The whole stance is antithetical to innovation all for the sake of wanting to take something because it has a high potential value.
So what you’re proposing is just that a company’s shares are taken away from the founders/execs as the company grows. It’s not just that you’re taking wealth away from them, but you’re fundamentally forcing them to sell off control of the company.