The angel investor couldn't just sit around and hope he gets a job, since he spent all this money it's in the angel investors best interests to not only get this kid in the right school, but to also line up employment for him afterwords using his own track record as a referral for a particular position.
Personally, I would prefer that the government or community would "care" through all your life as USSR did. Selling yourself as a slave to the private investor or corporation is inhumane and I think these contracts won't be ever enforced in the most countries!
Only someone who has no clue about life in the USSR can say something like that.
Your romantic ideas have nothing to do with reality. For starters, government is just a very big company the board members of which believe they have a god-given right on a monopoly. Some argue it is just the biggest organized crime syndicate in town. The distinction between private/public sector is useful in some contexts, but completely meaningless in the context discussed here.
You have to understand that your life is on the line if you are owned and are not useful to your owner. It really does not matter who that owner is.