There currently is no system to effectively deal with psychopaths, apart from lifetime incarceration.
IMO opinion:
Some psychopaths see a picture in their mind and say "That's the success I want".
They picture in their mind a $3M house with a pool. Add a management job with a title and the ability to control others. A couple of prime cars in the driveway. A trophy wife that doesn't challenge authority and boy / girl off spring, the millionaire's family. Maybe a cottage or pool. He is a self made man and the nicest person in the world to his friends and neighbours. He is liked in social situations, a white knight.
At work be may be an insurance executive and is appreciated by the board of directors because he doesn't care if someone loses everything because he rejects a claim, saving the company money. The public never sees his name so no shame. It could be any position of authority.
Then one of his kids gets seriously hooked on drugs and he can't boast about them being accepted at MIT. The other trades the three piece suit for a wife beater plus tattoos and the family picture doesn't match the photo in his mind.
Maybe the problem was his harsh over control but if you make that suggestion prepare for hell as he blames everything on someone else. He is perfect and will not tolerate criticism.
He is smart enough to stay legal and will bide his time for revenge, served cold will do.
Some psychopaths are happy with achieving the above picture. Others see it as a stepping stone to world dominance.
Maybe we're all psychopaths but with grander or less grand photos in our mind. Is there a line we wouldn't cross if pushed hard enough?
In the movie 1984 the romantic couple that temporarily evaded big brother finally broke down and gave up each other. Does everyone have their price, whether it's a reward (wealth) or punishment (kill them instead of me)?
Research into how the brain is wired from birth and rewired afterwards is in its infancy.