In Cuba, the only wealthy people are government bureaucrats. As always, communism becomes dictatorship and the people suffer most. Top down control of economy doesn't work. I went to numerous tobacco plantations in Cuba and they told me the government takes 90% of their harvest and they're allowed to keep and sell 10%. I stayed with an OBGyn who gets paid $80 USD/month. He built his house out of cinderblocks. That's how you get rewarded for your 'free' education. Anyone glorifying communism is a fucking idiot with no life experience.
That share of income from wages started its downward trajectory in 1971, when the US removed the gold standard and money-printing replaced hard money. The result was a man-manipulated interest rate fueled economy. Low interest rates benefit existing asset holders the most since they most definitively increase asset prices. Think about the simplest discounted cashflow, a perpetuity. When you change the discount rate r from 4% to 1%, the perpetuity value increases by 4x.