Pay It Forward
model in the United States for financing higher education under which students attend college tuition-free, and after graduating begin to pay a fixed percentage into a fund to pay for future students' tuition
en-US/ˈpeɪ ɪt ˈfɑɹwɚd/
en-GB/ˈpeɪ ˈɪt ˈfɔːwəd/