One way to keep your population under control is to keep them uneducated, stupid and simply not able to ask questions.
That process is also a great way to make sure you always have enough drones for your army... being stupid does not lead to great jobs. The army, however, will look after you, your wife/husband and your kids, even when you're killed in some illegal war.
Keeping people stupid also limits how much they understand of what they hear on the news and also limits how much the really know about anything outside their own neighbourhood, which is to say world affairs are way, way, way above their comprehension.
Yes, I'm talking about the USA in case there's any question.