Either they can't actually replace enough people with robots yet (especially as robots still need humans to maintain them, they're not self-replicating yet) or it's because they enjoy lording over us too much and being a lord without serfs isn't as fun.
Either they can't actually replace enough people with robots yet (especially as robots still need humans to maintain them, they're not self-replicating yet) or it's because they enjoy lording over us too much and being a lord without serfs isn't as fun.