So the company never operated at a profit - it was profitable in the end, was it not? And who created all of that profit? Who sacrificed for the company and were never paid what they were worth to make it good enough to sell in the first place?
The plumber was already paid the full value he was worth because the power dynamics are entirely different.
A company that can't turn a profit isn't doing so because it's paying the workers the full value of their labor. That's absurd. Is that what you think happened? Do you think the workers were being paid such extravagant wages that the company couldn't profit?
Obviously not. Why do you think the company became valueable enough to buy in the first place? It took the stolen surplus value created by the workers and reinvested into itself over-and-over, becoming a valuable company even if it couldn't turn a profit. No one would buy a company because it's worthless. They do it because it's valuable, and all the value comes from the workers.
You should familiarise yourself with the details of this particular transaction, because your idealised description bears very little resemblance to what actually happened. There's a reason this is known as one of the worst business deals of all time.