Christopher Nolan philosophy explored through the Dark Knight trilogy: Greed

Batman Begins is a Blade Runnerish film as the audience sees the protagonist reject his wealth and family in order to become a criminal and terrorist fighting police corruption.

He nearly becomes a vigilante prior to a mob boss killing his parents' murderer.
It's probably also a commentary on violent films.

Bruce lives a world of wealth in a house.

In the Dark Knight, wealth becomes an issue as well, as the city has become filled with the rich and no more poor. What of Al Ghul's men though?
The Joker is the one man who can take them down as they play politics with Senators and District Attorneys. Harvey uses his coin, a piece of money to decide things.
The Joker burns money. He has no wants.

In the Dark Knight Rises, the stock market plays a key role. In addition, the League of Shadows reappears taking away all of Bruce's power.