AI is only in a supporting role here. It's massive data collection and storage at low cost that's the problem. Machine learning just helps to digest the data. Tech has solved the problem of previous attempts at Big Brother - you just couldn't afford enough watchers to watch everybody all the time. Now, you can. It's even profitable.
And tech will also solve the power problem of autocratic regimes. Right now, a dictator can't control every single individual in the country on their own. They need police that can search your apt at 5am because you made a blog post critical of the government. They need lawyers to convict you, prison guards, etc. In such regimes, the dictator still has to put people into places of power so that the will of the dictat…
You don’t even need to go that far. Just require everyone to get a chip implanted so you can enforce punishments, and place cheap recording devices everywhere. You can easily figure out who’s saying what to whom, search everything, figure out the gist and predict every meeting before it happens. You don’t even need the chip - just make it so that a person can’t buy food, and boom. Easy social control. And inescapable because people who don’t comply are ostracized by friends otherwise the friends don’t eat either. You get the algorithm right and you can break resistance same way FBI broke Mafiosos’ “code of honor”.