People who are born at a level tend to stay at that level throughout their entire lives. This is just as true for the rich as it is for the poor. It doesn't mean that the rich are good and the poor are bad, it's that people tend to go through the lives they've had prepared before them.

Given that this is the case, legacy admissions should be relics of the past. People who are born with extraordinary access to capital don't need more help.