Definitely agree that empowering those who's only desire is power is not a desirable outcome. As for the current crop of elites, I get the impression that there is a clear split between business elites and political elites. Wealthy but foolish kids are of only limited benefit in the world of business, but in politics knowing some senator's son opens a lot of doors. (This is not a desirable outcome, of course.)
To the extent that eliminating legacies disrupts this pipeline, great. The world does not need another President Bush.