(Continuing the metaphor) Oh cmon. Bees are too stupid too care. They fly past the beekeeper everyday, watch em take the honey, and when they tell their buddies, they get told , "hey, you're nuts. We are bees stick to flowers."
What I'm trying to say is the beekeeper (alien) doesn't care. Heck he kind of enjoys his job. Lay a little smoke and he can do what he pleases. If the hive doesn't produce enough workers the Queen is all but replaced. And the people, the bees are in a sense of denial. Look at people and how they react to trauma or truths they can't fathom or accept. They ignore them of their own accord. No alien or government has to do that. The point of the government is to keep producing more. It happened during slavery throughout history. Give a few slaves 'power' and a sense of superiority over the others and the system supports itself.