I wrote about this a bit on my blog [1] but to add to this idea,
> Maybe prostitution to the owners will be the only available job.
Pre industrial revolution, labor was in a sense cheaper than it was during the industrial revolution, and one genuinely interesting set of professions that existed then was house servants. Butlers, maids, cooks, under butlers and so on. It would not be inconceivable to see the return of these kinds of jobs? Ones where the value of human labor is so low that working for someone with wealth in their own home is common?