"Corporations exist for whatever reason their creators decide" - the state
is the creator of a corporation! They don't just spring out of nowhere. Corporate entities, LLCs, etc. exist literally because the government in whose territory they operate grant them a charter that allows them to enter contracts and make agreements independent of the personal liability of the owners. That government can revoke that charter (and it has happened in American history--it's not a theoretical thing, it is real and an extant power (one that goes unused, but extant nonetheless).
We, as the actual owners of that government that grants this special exception, can--and should--expect better than the barest bare minimum out of such fictional persons if they want to keep their fictional personhood. This is a transaction: "we grant you the right to operate a fictional person and you don't act like shitheads in our society."
We don't do this, largely because of the weird little melty fears that led to you going off about collectivism when it doesn't apply here except insofar that labor participation can encourage, though does not guarantee, better behavior. But we can, and we should, keep this tool at the ready because corporate entities will be good citizens only so long as you keep the proverbial fist of an angry god ready to strike; sociopaths (and your standard corporation is a sociopath by definition) only, only, respect consequences and so those consequences must be severe and always at the ready.
A careful reader might note that I said nothing about such companies operating as unlimited-liability partnerships. Because yes, fair is fair, and people (who, unlike fictive entities, have rights and freedoms even if the results of those rights and freedoms suck) have the right to do as they please so long as they aren't harming other people. But they wouldn't take that option and we all know why.