No, not all system allow exploitation, you saying that they do is another big fat lie. Bitcoin with PoW is not such system, Communism is also based on this same PoW principle.
Bitcoin exploits the work of the miners... sure they get paid. The same as a person gets paid for their work.
Sorry to say it, but you just don't get it. This is such simple logic & easy to understand but you keep on thinking your things that are brainwashed into your mind.
Bitcoin doesn't exploit work of miners at all, every miner gets paid FULLY for work they have done. Person working for capitalist gets paid much smaller fraction of the work they did.