If there was such thing as Bane seeing the power structure of Gotham as corrupt then that fact should have been properly realized on screen; actually show/portray the corruption within the power structure. Give credence to the character's motives. Begins managed to that for Ra's
Not really. What was the intended outcome of Ra's's plan? A city without crime? I think not. Ra's wanted to destroy Gotham. His motives were ultimately no more noble than Talia's. And you can call Daggett a caricature, but the fact remains that he's real in-universe. IMO he serves as a parallel to what Ra's said in BB about how the League's ability to infiltrate Gotham's infrastructure proved the existence of the corruption they were talking about.