The author seems to be unhappy about parents being able to pass some of their success on to their children. If you couldn't do it, would there much motivation

The author seems to be unhappy about parents being able to pass some of their success on to their children. If you couldn't do it, would there much motivation to succeed in the first place? From another angle, does the movement to equalize children have any chances against those above the median (and those from below hoping to get ahead)?