It's ridiculous.
Numbers are funny, anyway. Nvidia CEO Jensen Huang's net worth is closer to yours and mine than it is to Elon Musk (Forbes list currently placing them at ~100 bill and ~250 bill respectively). But that's only in absolute terms. In reality, Jensen's got like 8 or 9 orders of magnitude more wealth than I do depending on how far into the month we are, and on the same order of magnitude as Musk.
Either one losing 99% of their wealth would still be above a billion.
If you read my other comment, basically I've heard from other commenters online that some collective bargaining agreements restrict individual bargaining. That would suck. If the union only sets floors instead of absolutes or ranges, that is another thing entirely and something that I'm very much in favor of.