If someone gives you something or helps you , it is a natural human instinct to feel obligated to them. Psychopaths consist of roughly 4% of the population, but this can vary its time and place. They do not have this instinct, but they have learnt  how to exploit it by lying to, and cheating, non- psychopaths.  

“Government” is essentially psychopaths controlling non-psychopaths. 
This is why there is no “correct” form of government/political system. Politics is a vicious game played by psychopaths with each other.

Societies  change/collapse when non-psychopaths become aware of their exploitation by some means. Politicians try to slow this down by censorship and even imprisoning people who facilitate this awareness. i.e “Hate speech “

  Political theories  are based on the idea that people are NOT divided into psychopaths and non-psychopaths.  Hence :  “Equity” “Equal rights” “Human rights”  “each according to his ability “ 
“Societal values” .
It is laughable that Political Science does not discuss psychopathy.

In the past people lived in small groups/villages. By means of gossip, it was very difficult for psychopaths to operate without being discovered. When they were discovered they were made to leave the group, which effectively meant death. 

 Sadly, when you don't have personal relationships with the people in charge, they are incentivized to act like psychopaths. 

 I see this a lot in people my age (I'm a zoomer). I'm not sure what is causing it. The NPC meme is a very telling example of this. It is one of those jokes that isn't really a joke.