The movie stated no such thing, characters in the movie said it, and they were the antagonists whom the audience isn’t supposed to identify with. Unless you somehow thought the movie wanted the audience to identify with Bane and not with Batman?
The villains were portrayed with bombasity and care precisely to deconstruct them.
The city’s rich were as much as a villain a Bain. Every rich person an oppressor of the masses. The government an oppressive regime. Not one hero in the ordinary masses, instead they enjoy the rape and pillaging of the rich. Destroying their property that they didn’t earn.
The movie could have been so much better if Nolan had faith in humanity. Where citizens fought back, where some of the rich offered food and belongings in support of the poor, where people helped people out of the kindness of their hearts, where honest businessman contributed in this time of need. Where people stood up and died for the cause of right. Nolan has no faith in America or the American people, his portrayal is the opposite of what America is.