If a person is that financially rich but still has to live like a grad student, it seems like the only point of that wealth is to rebel against the legal system. Even if one isn't caught, there's still a loss of freedom to avoid getting caught.

I haven't studied criminology, but I alternatively suppose someone who does that just doesn't think that far ahead. This likely also explains why the vast majority of people with these capabilities choose to live a life in accordance to their country's laws.