What exactly is the alternative? Not investing your money? The entire world runs on it. It's not going to change.
No? Then too bad.
Because "equality of opportunity" in the US is only available to those who are more equal than others.
If there were no exceptions, then how could those born into wealth persuade themselves of their own moral superiority?
Such children born into the bottom quintile of income, are pretty likely to end up in any quintile. The probability of ending up in each quintile from bottom to top, is 17%, 23%, 20%, 20%, 19%. Seems pretty fair to me; totally fair would be 20% chance of each.
It's a little skewed for people born into the top quintile, but not so much: 10%, 13%, 21%, 27%, 30%.
Source: https://www.brookings.edu/blog/social-mobility-memos/2014/08...