<p>That is the rub, isn’t it. Is there anything to prevent a student from declaring a major in the humanities, taking enough courses to fulfill the requirements, but loading up on lab courses? And even if that did not happen, how would one treat a student who took only humanities or social sciences courses vs. one would divided his or her course load between lab and non-lab courses? Not to mention students who keep changing their majors. The administrative headaches would probably not be worth the extra revenue.</p>