Why not use what we have already used like future service for scholarships (underwriting an education for limited commitment in the future)? As I mention elsew

Why not use what we have already used like future service for scholarships (underwriting an education for limited commitment in the future)? As I mention elsewhere, of course it eliminates people wo just want to play around or students who don't know what they want. But it's be an option for serious geniuses who want to cultivate their intellect but maybe don't have an alternative route.