Let’s say you’re about to walk into a room that contains an unknown number of hostile people who possibly have guns. You don’t have much of a choice about which way you’re going, given that the “room” you’re currently in is really more of an active garbage compactor, but you do have a lot of military-grade garbage to pick through. Do you don some armor, grab a knife, or try to assemble a working gun of your own?
Trick question. Given adequate time and resources, you do all three. In this metaphor, the room outside is the future, enemy soldiers are the prospect of a dystopia or other bad end, AGI is the gun (least likely to succeed, given how many moving parts there are and the fact that you’re putting it together from garbage without real tools, but if you get it right it might solve a whole room full of problems very quickly), general sanity-improving stuff is the knife (a simple and reliable way to deal with whatever problem is right in front of you), and cryonics is the armor (so if one of those problems becomes lethally personal before you can solve it, you might be able to get back up and try again).
Voting prevents revolts in the same sense that a hydroelectric dam prevents floods. It’s not a matter of stopping up the revolutionary urge; in fact, any attempt to do so would be disastrous sooner or later. Instead it provides a safe, easy channel, and in the process, captures all the power of the movement before that flow can build up enough to cause damage.
The voters can have whatever they want, and the rest of the system does it’s best to stop them from wanting anything dangerous.