Benjamin Franklin said: "Our Constitution was made only for a moral and religious people. It is wholly inadequate to the government of any other."
In other words, something noble like the Constitution only works for decent human beings who have a conscience.
It does not and cannot work for evil, psychopathic criminals who have absolutely no conscience, because they will utterly ignore it and do whatever they want.
The United State Consitution, much like the Ten Commandments, is simply a set of guidelines for decent people who want a better life. There's nothing inherently in it to force anyone to behave, so the psychopaths don't.
It's up to the rest of us to deal with them.
Spotting psychopaths is very necessary in business recruiting, but if you learn to look for it they become somewhat easy to spot. The are several books by Robert Hare that are very helpful for spotting Psychopaths, and once you've seen a few, the characteristics (like a fake smile at inappropriate times) become easy to spot.