Robots do not just make better workers, they are also better warriors. How many Chinese peasants does it take to kill a single UAV? How many protestors can modern riot police crowd control using sophisticated psychological warfare combined with advanced nonlethal weaponry?
Once the violent, unskilled, uneducated, unmoneyed lawbreakers are rounded up by the riot police and thrown in jail... then what? The Chinese are not shy about executions. How about humane lethal injections for everyone?