> People in other societies do this all the time -- entire families in China, for example, will pay in invest in others' education or pay for them to emigrate t

> People in other societies do this all the time -- entire families in China, for example, will pay in invest in others' education or pay for them to emigrate to the US, with the understanding that if the person succeeds they will bring over other family members or send back money. Indeed I had this in the back of my mind when I suggested my idea. > enforcing 'percentage of paycheck' contracts is difficult. Just see how much trouble people have enforcing alimony or child support payments, even when the case is 100% legally clear. Alimony and child support payments are forced upon them from above - this is nothing that anybody would willingly agree to if he/she could choose freely. On the other hand: Getting financed to learn something new is something people would willingly agree to. And if after that they earn more than before even after "donating" the 40%, they are still better off than before.