Foxfyre wrote: They can and do. If you donate a new library wing or science lab, you can pretty much count on your kid getting into that university if s/he qualifies. But the fact is, it is far more likely to be the alumni who make such contributions and that's where the heritage or legacy concept comes in. As I am not a contributor to any of the schools I attended, my kids would have no better chance of getting in than anybody elses.
I just took a look at
FindLaw's annotated constitution, and it seems that the last few decades of Supreme Court precedent agree with you on this point. Here is how I understand their overview of the cases:
(1) The government cannot privilege one individual over another.
(2) The government can, with limitations, put people in different categories, and treat categories differently from each other.
(3) Different forms of unequal treatment by the government trigger different forms of scrutiny by the courts, depending mainly on two variables: (a) How suspect is the government's classification? and (b) How fundamental is the right being infringed unequally?
(4) If a right is fundamental, or if the category is suspect, the court applies strict scrutiny: It prohibits the unequal treatment unless the government can prove that the unequal treatment is narrowly tailored to serve a compelling government interest.
(5) Race is a prototypical 'suspect´class for puroposes of characterization. Income and past donations are not, as far as I can make out.
(6) Admission by a university does not seem to be a fundamental right.
(7) (Not on the same page, but elsewhere on FindLaw:) In 2002, the Supreme Court decided a case called
Grutter v. Bollinger. It held in a 5:4 decision that maintaining a racially diverse university was a compelling state interest, and that universities could use race as one factor among many in their admission policies. Sandra Day O'Connor wrote the opinion of the court, and it is this decision that is back in play now that Alito sits on O'Connor's seat.
So you're right: The US constitution, as interpreted by the Supreme Court, does scrutinize discrimination by race more strictly than discrimination by alumni status. I still don't think it's bad policy to reserve places for the children of alumni, but it does not seem to be unconstitutional policy.