Senior University of California administrators are expressing interest in a radical proposal to change tuition policy, The San Francisco Chronicle  reported. The idea is to replace tuition with a commitment by students to pay 5 percent of their income back to the university for 20 years after graduation. The plan came from Fix UC,  a group of students at the Riverside campus. They have presented administrators with data showing that the plan could provide sufficient revenue to the university without creating burdens on current students, and while keeping repayment requirements affordable. Mark Yudof, the university system president, called the plan "constructive," and said he has asked system officials to analyze it.