I agree that AI could in principle become relatively objective. However I don't see that happening. People/groups building these systems will put their values in them, and they might also be willing to control populations. AI will become very very powerful in the future, and it will be able to influence people in way they don't understand. That's why I hope that AI and blockchain will become linked with each other. The blockchain would be a ledger of everything the AI does, and audits will be possible whenever needed. Of course, there will be AI systems running in the background by powerful groups no one knows about, which is bad.