The most recent federal database (IPEDS) year corresponding to net cost post above lists the following stats:
Columbia – 56% receive FA, 52% receive grant aid, average aid = $65k
Northwestern – 61% receive FA, 52% receive grant aid, average aid = $64k
Pomona – 64% receive FA, 56% receive grant aid, average aid = $64k
That said, I take your point. A good portion of students are full pay at all Ivy+ colleges. It’s a very wealthy population as a whole. In the Chetty survey (old), 41% of students at Northwestern came from top 5% income families, corresponding to >= $350k/year income in 2025. The majority came from top 10% income families. You mentioned Tufts. At Tufts, half of students came from top 5% income families.