Thanks for the comment!
The voting mechanism is basically designed to ensure all the uncertainty that a real coup entails. You can make an attempt with just a simple majority, but traitors to the rebels are loyalists to the kings. Replacing a regime requires common sentiment, and with so much power at the tyrant's whims, it's almost impossible to keep the government in check.
In short, I sacrificed a mechanical-fun point for a theme/setting point. Depressing, but reasonably accurate.
The policies may entail all reccomendations for the betterment of the Sunlord's glorious oasis, and that's all the citizenry must know. The game ends only when players get bored.
The actual idea of the endgame is supposed to get a bit like Mao, where the players design better systems but ultimately get caught up in all the possible backstabby incentives that can be provided in the base system.