I came across a New York Times article today with the title "No Tuition, but You Pay a Percentage of Your Income (if You Find a Job)".
I have remembered that I read a short science fiction story a while back where the main character was buying something and the salesman convinced him to buy the newer/better model since his children would be paying for it and not him with hours that they would be working to pay it off. After some struggle with the decision, the main character accepted.