I think you missed the whole point of the movie, which is that all those slogan was a facade underneath which is just nihilism, and that Batman fought to save the city from them.
The movies states through example that the government is willing to imprison it citizens on a whim, rich are corrupt and immoral, the rich deserve to have the possessions forcefully taken from them, we can’t be trusted with unlimited energy (which of course is readily available), we have a weak and timid population (I guess that is why they had to choose a liberal mecca, it would not have happened in the south or in Michigan [Wolverines!]), that for the most part humans do not have one redeeming quality, etc... the script was written by Chris Matthews.