The math becomes interesting with the Warren's proposed 6% tax for billionaires. After 12 years, the founder will have lost half the ownership of the company [ (1-0.06)^12 ].
There are some proposals for the owner valuing the company or giving the government shares in the company in lieu of cash. However, if you do that, within 15 years, the government will have a controlling stake in every pretty much every private company.
There are some proposals for the owner valuing the company or giving the government shares in the company in lieu of cash. However, if you do that, within 15 years, the government will have a controlling stake in every pretty much every private company.