Shit like this makes me think the Billionaires are afraid of wealth tax because much of their wealth isn't real. They can materialize 0.05% to fight legislation, but if they tried to liquidate a significant portion of their stocks or whatever that'd decrease the value of the rest of their fortune, not to mention somebody needs to buy what they sold.
They need other people to think what they own is valuable; and they do that by owning it, as rich people are reputable in many people's eyes. If they sell the feedback cycle inverts