The two scenes you cite aren't enough to justify the uprising. Selina is obviously a highly skilled thief - saying that she was forced into her life of crime by social inequality is not particularly convincing. There's no indication that she was ever starving - and if she was, when did she have time to learn how to crack uncrackable safes and do jujitsu in 4 inch heels? As for the kid and his talk - I would have very much liked to have seen more of that storyline, as it was his vague mention of lack of work for his brother as well as his faith in the Batman as a savior figure - a person supposedly considered by the entire city to be a ruthless murderer - seemed very out of left field with no follow up. Furthermore, if the power structures of Gotham were clearly corrupt and oppressive, who does it make Bruce Wayne for the story to begin with him hosting all of them at his home, apparently not for the first time. This is my very issue with the film - it's full of mixed messages. It's not at all clear that many had become desperate. That's why the "revolution" feels so bizarre in the middle of the story. A single scene of an orphan who lives in a boy's home saying his brother is having trouble finding work really does not go nearly far enough. The scene in BBegins when Rachel takes Bruce down to Lower Wacker drive and shows him people living on the streets did a much better job of creating the sense that the city was rotting from underneath. You don't get anything like that in TDKR.