You miss the point - they are sticking to the curriculum, the Marxist one. Why do you think there is a "magical" curriculum to which they should stick, and to which we all would agree is "proper" ?
You are right, of course. The poly science, lit, comp, and several economics courses pretty much espouse Marxism. But it is hard to work that type of position into physics, calculus, chemistry, accounting or computer types of classes. That is probably what steered me into more math and science classes even though they weren't my major. It doesn't have to be a magic curriculum, just one where they actually teach hard sciences or skills related to a real job. To many kids haven't been prepared to take these more challenging courses, so they waste their time taking easy clasess like art history, poly sci, sociology, black history, women's studies, literature, where all you have to do is echo back to the professor the limp minded PC drivel they spit out, and you'll do no worse than a 3.0.