You are familiar with the seminal work by Dunning and Kruger, yes?
https://en.wikipedia.org/wiki/Dunning%E2%80%93Kruger_effect
The kind of boss that would think that they can eliminate all those awful workers, are the kind that would never consider such an outcome.
Consider the implication, when combined with P.T. Barnum's Maxim.
There are of course, more implications.
Who will be buying the products their workforceless production lines produce, using what money?
The only people with jobs will be bosses.
Who will they be selling to?
And, as you pointed out, the people selling the robot workforce on a subscription, will still want their lump of flesh.
It's a gloomy future for these naive bosses.
very gloomy.