It may also have be due to the fact that many parents are not in place money wise where they can help out their kids or that the parents think their kids should pay their own way through college. Do many college kids work? I know when i was in college very few people I knew had a job of any sorts during college.
Both of these are obviously contributing factors, but again, I can't imagine much difference compared to neighboring states or peer universities. In my experience, roughly 70% of my friends and people in my classes had some kind of part time job during school. However, one would think that percentage of students with part time jobs likely varies by major, making my estimate skewed from the start. As for the leading factor, I still would have to point to the dramatic drop in state appropriations for public universities.
Referring back to one of the stats I posted earlier, 93.9% of state need-based grant aid was to private colleges and universities. Total enrollment for private colleges in Iowa is about 44,000, while total enrollment in public is about 70,000.
If I'm reading it correctly, that means students in private universities, about 39% of all college students in Iowa, receive 93.9% of state need-based grant aid. The remaining 6.1% is spread out among the public university students who make up 61% of the students.
Now to compare to our peer group universities in other states. The average percentage of state need-based grant aid available to public universities in ISU's peer group is a little over 60%, while ISU gets only 6%. Why the huge difference? I'm sure there must be a good reason. Maybe because of the large number of private colleges and large number of students attending those private colleges as jaretac mentioned earlier?