Point them out and give us a percentage. On top of that it would be nice to see the number of students relying on loans in your category of majors--I suspect (from personal experience) that more well-to-do people would major in Latin or Art History.
Slide 13 is of particular interest, almost a third of all graduates wish they could:
a. Pursue more scholarship opportunities. While there is obvious parallel to reduction of their net debt, I also take this point as motivation to study harder (Quite a few of scholarships are merit based).
b. Pursue a different major. It is no secret that some majors have jobs out there that have high starting salaries.
c. Getting a job while in college. This is another work harder point.
Here you can see jobs that pay well. I think it is safe to say, that significant portion of people who want to switch majors did not choose one of the well paying majors. AFAIK every single one of those top paying majors requires you to study hard.
