In the free market, goods and service are sold based on supply and demand. Supply requires a large number of people, working together with various skills; innovators, investors, managers, workers, etc. People earn based on how they contribute, with some jobs paying more.
Higher pay often has to do with the degree of difficulty and time commitment of your job and/or how your job can get more out of those below you, in the chain of command. Labor, itself is also connected to supply and demand, with different people supplying different ranges of skill and commitment. I never wanted to work so hard, so I settled for less. That was my choice balancing work and play.
The problem with the political Left is they like big government, with the current Big Government giving the tax payer a negative 15% rate of return due to the debt. This tells me the best people are not in charge, since who in business can survive, year after year, being so incompetent. This is not free market based but more based on politics. Politics substitute bull crap, bootlicking and back stabbing for skill and hard work. You should not assume your idol; Big Government, works like the free market. It would be better if it did, since they would turn a profit and give taxes back. Instead they wrecked the economy. The inflation has given most worker a pay decrease all due to free market tampering by morons with power.
The Left often thinks the free market is rigged; politics, but there is competition to deal with that. Budweiser decided to play Lefty politics and the free market corrected this. Government has no competition and it ignores the will of the people, so government monopoly behavior is more common. This creates the injustice which then flows into the free market that you complain about. They killed oil in favor of green energy. This was not free market. In the free market both oil and green have a place, both create jobs, both compete, and both add to the GNP. Government is not free market but wasteful due to political posturing and backstabbing. The Left needs to think deeper.