GPA is a horrible measure of anything, only giving rank among your peers for that particular environment. MCAT is better, since everyone has to take it, however naturally good standardized test takers like me have a clear advantage and get better scores than people who can know more, but aren't great at this particular form of examination. Churchill said
It has been said that democracy is the worst form of government except all the others that have been tried.
I think that applies here to, the system isn't fair, or close to perfect, but there really isn't a feasible system that would be perfect given the huge variables in education. Maybe a better system, at least for medical schools, would be to go into a 6-7 year program without having to do undergrad. During the "undergrad" like year(s), there would be an overabundance of spots, and the medical schools, being in control over this education, would be able to more clearly see who should be allowed to move into the more limited medical spots.
As it is though, I can only think of the girl I overheard bitching about how it's unfair that her roommate has a 4.0, but doesn't work, or do research, etc. and it isn't fair, but tough ****, we all know the rules of the game, and if you can't figure out how to [ethically] play it to your advantage then that's your problem. Medical schools at least have the saving grace of seeing your extra curriculars, essays, and interviewing you to make a much more broad review of applicants, however that still isn't going to reveal things like students taking easier professors to get easier A's, or in my case the fact that I received an A in physics 1, despite not learning one thing, and having a 67% average (we made a petition to get the prof fired, as far as I know he taught only one semester after).
You can't overlook the fact that people's attitudes toward academics change; people have the revelation that their effort matters at different points in time, and not everyone that can be a superstar in college was one in high school.
Very true, I had a 3.5 gpa in highschool and got a 26 on the ACT. I aced my exams and didn't do my homework, with my drive for grades being "I'll only do well enough to not piss off my parents." I didn't think about scholarships, and so now I'm surrounded by kids with full rides, seeing the idiot I was. I only really thought about middle school not mattering, so ergo high school won't either, and so I'd buckle down in University, which I did. Further, a classmate of mine was expelled in middle school for dealing drugs in school, he's a second or third year pharm student now.