Well selling the Bowl swag is opening the same Pandora's box (drink!!) nanoseconds after its NCAA legal enterprising boosters are going to find a way to make it clear to prospect X that his future used Bowl swag will be worth more to him if he comes to play for their team. Dad then legally holds an open cry auction for the rights to buy hot shot recruits future Bowl swag. Then about 1-2 years later you are going to get the first case of Dad suing a booster because he didn't pay up and some smart lawyer type like Atticus Ubet finding a good reason to sue the school while he's at it.
You think these kids are taken advantage of now, let that come to pass and watch the shenanigans.
As far as the salesman's salary thing goes, lets be real and put the cost of a 4 year degree at about $100K. That's what they are getting paid, they know its deferred going into it so the analogy to an uncompensated adult is apples to oranges. They are working a 40+ hr a week job and getting paid about 25K a year in total comp with some fantastic benefits. The upside is they can parlay that job into a better than average lifetime income stream if they play their cards right and that's got nothing to do with playing in the NFL.
Nothings perfect but its a pretty sweet gig. Starving kids in China would be happy to take it.