Graduate school professor here- some of what you say is true (particularly the stuff about passing people regardless of the quality of work)- I've also noticed a great deal of entitlement among the students, and the idea that if they're paying tuition they "deserve" the degree, rather than working hard to earn it (plenty of incentive to spoon feed the kids just to get then through the classes).
That being said, in the sciences there isn't a lot of political correctness, mostly because it fails to come up much.
That being said, in the sciences there isn't a lot of political correctness, mostly because it fails to come up much.