Earlier quoted context omitted.
Yes and we've seen the outcome - top 1% benefits too much, and results in too much concentration of wealth (along with other structural issues).
If there is no difference between income and capital taxation people wont invest in companies. And companies wont last with out access to capital trust me I have chaired share holder meetings caused by lack of capital
Nonsense. What alternatives do people have? Putting money in a lousy US savings account with a 1% annual interest rate? By comparison the US stock market's average annual return has been 7%. Hence even if income tax rate were the same as capital gains tax rate, the stock market would still give you returns 7× higher.