Where did you get the idea that the link between society and government is such a one-way street? And who decides what is a norm? The list of governments which have recreated their societies as their leaders pleased is nearly endless, not to mention the real governments which exist today all over the world which oppress their citizens every day according to the whims of those in power. Your utopia doesn't exist in the real world. There is no such altruistic, norm-codifying government on the face of the planet.