That's how all wealthy civilizations end.
The central problem is that hierarchical systems reward and thus select for psychopathy.
People with principles, morals, ethics, empathy and/or integrity will have choices they will not make - courses of action they will not follow, no matter the potential rewards. Psychopaths and sociopaths are not similarly constrained - they're willing to do absolutely whatever it takes to succeed. So they will always have an advantage in hierarchical systems.
Additionally, once they gain power, they will generally arrange things such that it's easier for them to hold power, which not coincidentally makes it easier for other psychopaths and sociopaths to gain and hold power.
Of course, with psychopaths and sociopaths in power, the civilization begins to decline. At that point, there are two broad choices - to reform the system or to warp the system to protect the privilege of the psychopaths. Naturally, the psychopaths choose the latter.
So they find themselves in a situation in which the civilization is in decline due to their actions and they're determined to keep doing what they were already doing. So they need a diversion so that they avoid the blame for the damage they're doing. And that's actually fairly easy since there are a great many people who can sense thst the civilization is in decline, but who are too stupid and angry to sort out who really deserves the blame. And all the psychopaths have to do then is isolate some unpopular fringe group(s) and tell the stupid and angry peiple that it's all their fault, then the psychopaths can stay their destructive course while the stupid and angry people fight with whichever group(s) they've been pointed at.
And that's exactly where the US is today.