Actually they create a lower class by adding alcohol into their incubation chambers. The rich/smart make them stupid. They make them cheap laborers like a dictator keeping the value of a currency low with respect to other countries.
On the one hand, they say that they can't have automation: they tried, and the lower castes got too bored. On the other hand, they need the lower castes as menial labours.
Do away with the alcohol, and add robots, and you'll have a much nicer society.