I believe the successful psychopath holds herself to a separate standard than she does society. She realizes that chaos cannot exist on a massive scale. However, she realizes that she herself is an agent of chaos and she loses no sleep over such a fact. Ultimately, she uses this dichotomy to create a niche in which she thrives, be it parasitic or otherwise.
I remember a time in which I was married and my ex-husband asked me to give my thoughts on the following scenario:
A scientist has developed a cure for an incurable disease that causes quick death and offers it to anyone who can pay the monetary price he demands. A man, living in the same town as the scientist, desperately needs this cure for his wife but he is destitute and has no way to pay the price demanded. He pleads to the scientist, hoping that something else may be offered for the cure. The scientist refuses and the man is left with a choice: he can let his wife die and honor the code that society has dictated (stealing is wrong), or he can commit theft. What does he do?
My answer surprised my then husband.