That's catchy simplification of how complex human nature is, borders on ignorant. In every culture and political system you will have people climbing to power

That's catchy simplification of how complex human nature is, borders on ignorant. In every culture and political system you will have people climbing to power using universally unethical means and then use their position to inflict suffering on the people they see as beneath them or use that power for other types of personal gain or gain for the group they represent at the expense of others. It does not mean that every person is like this. It is a spectrum. Majority of people just want to live their lives in peace, but they have to navigate their lives through the whatever system has been created for them. You will have corrupt civil servants in a communist country just as in capitalist country and the elites are very much the same. I have lived in both systems and each system exploits slightly different groups of people. Sometimes it is hard to tell the difference.