This would really make sense for students. A lot of kids go through universities and wind up scared about their college debt. On average their expected improvement in future returns is more than enough to make up for it. But individually people are running a scary risk. If you can solve that and spread risk across many people, it should average out in your favor.
If you have enough money to do this and seek to invest, I would highly recommend going after academically successful but poor kids. They are the ones who are most likely to drop out of university or go to a community college instead because student debt is too scary for them. That is because their belief about likely future income is based on people they know, which is far out of whack with what educated people can make. But their life choices are likely to leave them at what they expect.
At a practical level this means that you have room to structure the deal so you get better average returns than a loan, they are better off after accepting your deal than they would be if they don't go to university, and they are better off than they would have been if they earn what they think reasonable. Everyone wins.
If you have enough money to do this and seek to invest, I would highly recommend going after academically successful but poor kids. They are the ones who are most likely to drop out of university or go to a community college instead because student debt is too scary for them. That is because their belief about likely future income is based on people they know, which is far out of whack with what educated people can make. But their life choices are likely to leave them at what they expect.
At a practical level this means that you have room to structure the deal so you get better average returns than a loan, they are better off after accepting your deal than they would be if they don't go to university, and they are better off than they would have been if they earn what they think reasonable. Everyone wins.