Earlier quoted context omitted.
How can a socialist system exist that is not inherently authoritarian? If someone refuses to follow the coordinated economic plan (e.g. contributing to a welfare state) then ultimately the state will have to punish them somehow.
How can a capitalist system exist that is not inherently authoritarian? If someone refuses to follow the rules ... you get the idea. The only difference is that they become the authority instead of being punished by it, but the practical effect on the vast majority is the same. See: Stalin's USSR vs. Putin's Russia. Different in theory, but both authoritarian and both imperialist and both (not coincidentally) very op…
It seems that it's more effective to leverage this natural desire (as in capitalism) rather that punish it (as in communism). The important part is "natural", i.e., people are born with it, as well as animals, and you cannot prevent it. That's not a minority at all. So the only way for communism is to constantly fight it on a great scale, which is possibly with turning into a authoritarian government.