He's proposing not just a centralized government, but one based on "Divine Right" as well -- that to disobey the King is to disobey God. It's pretty scary since we've seen what's happened with that in the past in our world.
But even democracies are "centralized", and even with how educated modern populations are, they're still idiots. (for example only like 1 in 3 Americans can name a single branch of government). There's certainly no reason to believe that a democracy will lead to better decision-making.
IMO, what he also needs to create is a 'shadow government' that rules secretly adhering to certain moral principles and ruthlessly cuts down people who stray from them.