"THX1138 was clearly about a communistic (everyone is equal) fascist state. What made you think otherwise?"
Because Lucas has said it was his critique of consumerism. He was not making a cautionary tale about communism, or the dangers inherent in a system which does not respect the rights of the individual.
I would say that communism is a corporate police state. Except the Corporations are part of the goverment as opposed to independent of it. It eventually gets hard to distinguish.