How many people have 100% ownership of a 50m business? How many people have more than 50/100m net worth (depending on the proposal) in the US?
- ownership percentage (0-100%)
- company value (50M - $2T)
The Cartesian product of all ownership * value that work out to > $50M is substantial enough that it's 1) probably not fair to individual business owners to force them to divest to raise a minuscule percentage of the Federal budget, and 2) probably not worth the potentially disastrous 2nd-order effects on pension funds and investment funds that are largely predicated on stable/competent corporate ownership.
In any case, it sounds like you've conceded that there is a forced divestiture, and now the argument boils down to: "is that justified?"