I remember in the book the hero lives in a world where nano-technology is widely used. He himself comes into possession of a nano-tech suit that plays the role of body armor, and (I think) even a means of space travel.
I know for sure the hero is stripped of all his wealth, and force to live outside the controlled society. This is as close to a death sentence as the legal structure of his world allows.
I remember that those in the slums use banner ads (which are quite literally physical banners) for warmth. He eventually reshapes the slum society and rebuilds his wealth.