I dunno man, I was really surprised by the behaviours I saw; maybe I have been particularly fortunate in my career but it definitely seemed to me like it was worse in the US.
Perhaps it's bad in other places too. I personally think it's idiotic, as the point of interviewing is to find great candidates, and I have never felt like the University they attended was a particularly good predictor of that.
That happens literally everywhere, especially at big companies that make easy money. The elites don't like sharing the pie with the great unwashed.