How a city works...

[Clodfobble]

The concept, called Pay It Forward, calls for students to pay a small percentage of their future income into an education fund to support the next generation of students.

When you pay back a loan, it is also "paying a small percentage of one's future income." Is the difference here that it is literally tied to income level, and people in rich careers (Pre-med students) will be paying more back than shitty careers (English majors?) Does this also apply if one is unemployed? Say I'm a young lady who decides to go get myself an MRS degree, knowing full well that as soon as I meet the right frat boy I'm going to settle down, have kids, and never use that Anthropology degree I coasted through... and then I'll never have to pay for it?