The workers supply not only the drama of suffering but also a (meagre, absurd) customer base for the fast food restaurants themselves.
Last but not least, given the long distances involved in interstellar travel, an oligarch must delegate their authority, either to a machine, a human, or a combination, and that is an opportunity for some drama as experience and vision inevitably diverge. This would be true even if, for example, the delegate is a perfect clone of the oligarch. It would be within these cracks and crevices hope could form, only to be crushed, in artistic, brutal fashion.
