Final Assignment Feedback - Who's the Slacker Now?

Pardon me as I embark on a brief edu-rant: Why don't teachers ever give their students feedback on their final exams/projects/papers?

One great example was my intro to research class last year. I spent the entire semester working on a monstrous research project, handed it in, and never heard another word about it. I even did what NOBODY DOES, which is visit the professor the following semester and ask to see my project and his evaluation of it. After looking at me like I was a Martian, he assured me it was floating around somewhere and he would attempt to find it. Needless to say, I've not heard a peep about it since.

So here's a memo from a lifelong student to an apparently clueless nation of teachers and school administrators: Schedule your final exams/papers for the SECOND TO LAST DAY of class so that you can actually give your students feedback on what was likely their biggest assignment of the year. Who knows? Maybe they'll actually learn something from it. Plus, then you'll have an extra week to collect finals from any slackers who don't hand them in on time. That way, both the students who actually want you to teach them things and the students who just want to pass your class would benefit.

As it is, I'm getting more and more suspicious that final assignments are actually never graded, and teachers just dole out cumulative grades to their classes based on gut feelings.