The more obvious way is very obvious: we had a professor who told us he'll be grading us by first tallying up the answers, and then applying a bell curve to the scores, so that X% of the students get an A, Y% get a B, etc., and some Z% of the students will fail. As you can imagine, everyone was up in arms about how obviously unfair this is.
The less obvious case, but close to what you describe, was scolarships. For almost every "track"[0], scolarships were awarded for top X% of students. In the "track" I was in, and another one in our faculty, the scolarships were instead given to anyone who crossed a certain absolute grade threshold, in (IIRC three) tiers. The higher the tier you reached, the more money you got, independent of how other students fared (probably subject to budget constraints, though).
Now, I can't prove it, but there was one other notable difference between our "track" and that other one with same scolarship model, and every other "track" at the university I was aware of: ours were famously cooperative, everyone else was fiercely competitive. I don't think it's a coincidence. My university experience was that of everyone helping each other out, because it was always a win-win both socially sometimes financially. Everywhere else, this was unthinkable - helping other students created a risk of them getting ahead of you and taking your scolarship.
I'm dismayed to see the same thing repeating in companies too.
--
[0] - I can't seem to find the correct word to describe the set of students across the years who pursue a degree in a particular subject (e.g. "Computer Science") on a specific faculty. I.e. the vertical slice.