Time is money.
[1]http://www.ihep.org/sites/default/files/uploads/docs/pubs/br...
The problem these schools have is related to people lying to get financial aid, and then dropping out, never to be heard from again. If you get rid of the price, and school is free, all this fraud would end. (The fraud would happen elsewhere in the system.)
However, all that said: the FAFSA really isn't that hard to fill out. If a person cannot fill out the FAFSA, why are we sending them to college? Will we fill out their college application for them, too?
Is the goal to make "attended college" become completely useless as a job market signal? Why are we trying to cram people into college if it means nothing?
I'm working off these two premises:
1. The FAFSA is free to fill out, but it takes time and attention, which you say some people do not have.
2. Even if we make community college completely free, it will still take time and attention.
So, if the FAFSA is a significant barrier to someone getting into college because it takes time and attention, why do we think this person will suddenly garner a mass of time and attention when it becomes necessary to do the classwork?
In case it's the first: the FAFSA, once filled out, makes these students eligible to receive money in the form of student loans and grants, which can cover living expenses as well as tuition. And to address the second: having money means you don't have to work, or can work fewer hours, and in general reduces the cognitive load of 'how do I afford to live', freeing up time and attention that the student can now put towards their studies.
I don't know about you, but 75% of the cost seems like a pretty sweet discount. Seems reasonable if you want more, you should have to go through some kind of application process.
I think even if you are under a 2.5GPA in high school Penn State subsidizes 80% of tuition and the state does another 10%, so each semester of courses would only be at most a few hundred dollars.