Congratulations you’ve just described central planning.

So “society” should be able to veto a sale, but when payroll is due the owners are on the hook?

Reductionist. Your phrasing it like the onky options are full central planning and libertarianism. Theyre both wrong. You need the free market to do what it is capable of, and regulate it when its isnt. The free market was going to let monopolies form. We have all already agreed thats bad. Khan's policies just updated that to the tech sphere

Actually, the owners not being on the hook when payroll comes due and the business is out of cash is exactly the protection that society has extended to incorporated businesses. But I'd be happy to horse trade unregulated m&a activity for owners, boardmembers and executives having full liability exposure, financial and criminal.