I always figured that game makers didn't do this because it wouldn't actually be fun to play with. Reminds me of when I played Medieval: Total War and spent most of my time dealing with uprisings. Like, do we want to deal with regulation bloat that causes greater infrastructure costs, so you have to pay billions to build a big road or whatever? Can you account for a Whiskey Rebellion sort of scenario in a SimCity sort of game?
Plus, most of these are predicated on the idea that you're the supreme despot. People can protest if you increase taxes, but they can't vote you out/execute you in public and put in new leaders who knock down the tax rate.
Maybe it's the difference between Kerbal Space Program and Galaga. There are certainly markets for both, but less for the former.