This uncle is not an evil man. When he breaks the law, it's because in his business those who do not break the law don't remain in business. The system was corrupt when he found it and will be corrupt when he leaves it. He has to make a living for his family. It's that ambiguity that makes the film interesting.
Most crime movies have a simplistic good vs. evil moral structure.
This process involves bribes, kickbacks and theft. But Frank is a reasonable and measured man who operates within a system that everyone tacitly accepts, even the police. There's a way things are done, everybody gets taken care of, everybody's happy. Then I learned that Frank was somewhat inspired by Gray's own father, who was involved in the same racketeering scandal that led to the 1986 suicide of Queens borough president Donald Manes, who stabbed himself when it was revealed that he had taken payoffs. When your father is supposed to be the bad guy, you don't always see it that way.