I don't think it would make it any easier to compare schools. I'm fairly certain a 30th percentile student at Caltech could go to Directional State University and be at the top of the equivalent class.
People trying to judge students based on grades would then have to have a rough sense of how the institution works and how a grade should be interpreted.
But this is what they have to do anyway, curve or not. For example, employers already know that a B- at an Ivy League institution is a somewhat poor grade. (At Harvard, 75% of all grades given are B+ or above.)
Admittedly I think the Ivy League system (which effectively is grading on a curve, just a very narrow one with the mean set to an A-) is pretty good. There's certainly little incentive for students to want easy classes, because in terms of grading there is basically no difference between an easy class and a hard class. It's as close as you can come to just not giving grades at all, but doesn't mark you out as a weird hippy school.
People trying to judge students based on grades would then have to have a rough sense of how the institution works and how a grade should be interpreted.
But this is what they have to do anyway, curve or not. For example, employers already know that a B- at an Ivy League institution is a somewhat poor grade. (At Harvard, 75% of all grades given are B+ or above.)
Admittedly I think the Ivy League system (which effectively is grading on a curve, just a very narrow one with the mean set to an A-) is pretty good. There's certainly little incentive for students to want easy classes, because in terms of grading there is basically no difference between an easy class and a hard class. It's as close as you can come to just not giving grades at all, but doesn't mark you out as a weird hippy school.