the age old unspoken donation "coincidence" this is how many rich people get their kids into Harvard too, the only reason parents got caught up in the varsity blues scandal was that they were too explicit... old money donates the new library and "hopes" for the best
That's the entire point and feature of these elite institutions (more specifically, their undergraduate division and business schools), to connect wealth with brilliant people. They are the traditional social institutions of innovation and entrepreneurship before incubators like YC were a thing. If you remove the wealth aspects, then the Ivies are no different than any other research state school.