My Guesses about the Causes of Growth in Inequality

Income and wealth inequality seems to a hot topic lately. Here are my guesses about the causes of the growth in inequality


I agree with those on the left that a lot of income and wealth is random. 
But to me that does not mean that it can be changed. 
I for one am not sure what caused the increase in inequality though I have heard many of the theories, none seems to work. I think it might be multiple things like: 

• Growth of finance (maybe Vanguard and the EMH will turn this around). 

• Investors and management have discovered that better people raise profits and have started bidding good people's compensation up. 

• Bigger markets for sports and entertainment. They are now worldwide markets. 

• Anti-trust causes in sports. Monopoly sports leagues paid athletes much less, even with more teams and lower seat prices?

• Software network effects. 

• Growth in healthcare and providers influencing regulation.

• Taxes were very high in the 1950 & 60s and that might have had some effect, but the rich did not pay much more of their income in taxes then than they do now. So I do not think that was so important.  If taxation had a big effect it could mostly be a  a measurement effect in that I bet a lot more income was hidden then.