Some shrink's specialty was testing prison inmates, and he came up with a questionnaire that was pretty good at determining how sociopathic they were. Murderers and rapists and other criminals "know" that they are "entitled to" abuse other people for their own profit or amusement (and many enjoy hurting others). Or at least they had no idea about any reason they should NOT hurt others, and that their own pleasure and whims absoltuely trumped any other consideration (like laws or "right and wrong").
Luckily, one day, this shrink was upgraded to Business Class or first class on a flight. He sat next to some CEO or VP and started chatting. "Gee, this guy would score high on my sociopath questionnaire!" he realized.
Later he did more research and found that the main difference between high-powered executives and obvious sociopaths like serial murderers was that the CEOs had better impulse control, and were smart enough to know that they would go to jail if they didn't have excellent lawyers and chose mostly legal ways to abuse, steal, and hurt people for their own pleasure and profit.
But the underlying psychology: "who cares how many people I hurt, if I WANT something?" was identical.
