I'd be fine having a discussion about what's "too massive" for a company and trying to figure out how to balance the interests of society and any given company (and its constituent individuals). But I'd like to start from a position of, what do we want society to look like? rather than a position of, how do we preserve the status quo?
Sorry, looks like you got outvoted.
Now you want to sit on some panel of judgement to overrule the public.
I love it when people say stuff like this. Society has spoken. You simply don't like their decision so your answer to is to create some super-powerful organization that can veto the public and instill its own version of what society should look like.
Fortunately, now, for the most part, in the west, we all get a say in that super-powerful organization.
It, and everything it spawns, like mega-corporations, exists to serve us, not the other way around.
This whole concept is like saying, well, one guy decided to do the things he loved, go to baseball games, get drunk with his buddies, and watch copious amounts of TV. But this other guy spent 8 years educating himself and working his butt off accomplishing many things. Let's reward them equally because they both grew up in the same town thus should have equal outcomes.
How far down the rabbit hole would we be going to go with this? Who gets to decide what the capital cutoff point is for "too massive" and the contribution cutoff point is for "due to circumstance"?
If I don't believe in free will, and thereby claim you make too much money because you technically weren't responsible for any of your actions and never chose the outcome that happened, can I incite a communist revolution and seize your assets? If I feel someone won the lottery because they were lucky, do I get to take all their money because they didn't contribute value or "earn" it in a way that I find agreeable?
Can you give me an example of someone who is wealthy who earned their money in a manner that isn't arguably due to circumstance? As it stands, I can't think of an example that is materially different from a tech CEO who happened to be in the right place and right time. Go far enough back and every idea and execution on that idea is due to chance. But that applies to everyone, not just tech CEOs, or whoever the robber baron of the week is.