What I'm talking about is human nature. Those democratically elected would eventually accumulate wealth and pass things such as laws that benefit them. I am sorry to say that but the working class can sometimes become gullible that any cheap slogans and promises might dupe them into supporting a charlatan or group of them which in turn those people become the new elite of that society. And the other thing is that even if that happened, the new authoritarian would be the society itself and in this case which would dictate what the individual should do, what to wear,buy, how to behave etc..

Humans are generally self-interest, and please don't misunderstand this word because it has many different shades. Most people assume that self-interest is being selfish which is only half-true. For example, I like nature and forests, and it's in my interest that i protect them from trash and pollution and thus i might become invested into protecting it and become an activist. People would think i am being altruistic but in truth it's serving my interest.