Whichever side of the argument you might be on, it’s worth looking at a very cogent and entertaining video talk by the late Professor G.A Cohen on some of the problems of ‘actually existing capitalism’. I found it while following up a reading of his Tanner Lecture, ‘Incentives, Inequality, and Community’, given at Stanford University in 1990-91, which contains a powerful argument against incentive justifications for income/wealth inequality.
The talk was evidently broadcast on the UK Channel 4 some time in the 1980s. You can find the video here at ‘Sociological Images.