The tax is his shares, those shares become public assets, the government and (ostensibly) the citizens finally get a say in what the hell is happening with that guy.
You have a vendetta against a guy, for grievances, some legitimate, and want the law to change, specifically to get him, because you hate what he says. You also want to nationalize his businesses, that he built, that he did not have to build, that now employ 140,000 people, that he did not have to employ, with those 140,000 people almost all being high income earners paying higher tax rates when they may not have otherwise, out of your hate.
I would call that greed and a despicable position.
On that note, it's also completely pointless. If you were to literally liquidate every billionaire in America, every single one, and somehow got current market rates for every single stock share, 100% tax rate beyond $1B... we would cover the deficit for 3 years. With everyone else still paying taxes. Then we're back to square one, running a $2T deficit every year with no billionaires to liquidate. It's entirely catharsis that accomplishes nothing. If such a tax were even passed, we wouldn't make it to the next election cycle before it's a problem again.
Even if you were to liquidate every billionaire in America, at a 100% tax rate above $1 billion, and were able to sell the shares at current stock prices without a collapse, you would pay for the government deficit for... 3 years. Because their combined wealth, on paper, is $7T while we're running over $2T shortfalls every year.
3 years of not taking out debt, while still needing everyone else to pay current rates. Then you're back to square one. Sans billionaires and sans any major capital investment anywhere.
Bought one of these miniature kits years ago and kept it on my desk at work and goddamn is it cool and fun and works great! Really encourage any model machine nerds to get one.
Oh those ones look much better than the one I brought off AliExpress years ago. Not to mention it was missing a bag of parts and they wanted me to send them a photo of the missing parts…