I'm actually fine with this? He owns a good chunk of that corporation so he's paying the tax either way. And other shareholders can decide whether it's worth it to them to help him pay the tax.
Not in Meta's case. Facebook voting rights are set up so that Zuck always controls a majority of the votes (even if he doesn't control a majority of the shares). Some stocks are more equal than others.
Nobody had to buy shares in Facebook.
In fact, Californians have to hope that there are enough people out there willing to buy the ~8-10 billion worth of shares he needs to sell to cover the wealth tax, if it gets imposed on him.