One was a lawyer who defrauded his elderly clients and the other just only worked for his parents his whole life after getting kicked from university for cheating and then attached himself directly to the teat after they retired. Once his father died he took over the life of his mother as she was descending into Alzheimer's and looted her assets with the help of his brother before he was disbarred.
Both thought that everyone else was doing it too- it was just about not getting caught. They literally couldn't comprehend the idea that others weren't just hypocrites.