I suppose it could be a problem...but it will now just be the same as how college baseball and college hockey already are.
Some players choose the college route, and some players choose the pay to play route. Some from both groups will succeed and some from both groups will fail.
I would love to see HS players go to the DLeague for a year. They get paid, their housing and meals are taken care of, they get to practice a TON, they train with people whose job it is to develop them(as opposed to hyper competitive Euro coaches who have to win right away or else get canned) into complete players, NBA scouts and front offices are able to easily track their progress, and they play a full season which gets em ready for the NBA.
Sure its only $20K instead of what they could get in Europe, but $20K plus housing and meals while getting all the practice, training, and game experience you can handle is a sweet option when compared to sitting on the bench for much of the season due to a Euro coach that doesnt have time to let you play thru mistakes(Jennings for example).
Obviously that didnt hurt Jennings in the draft, but for the elite recruits that arent quite his level of elite, sitting that much would kill their progress.
A viable and respectable minor league system for the NBA would be great to see. Like minor league baseball, having teams that are stable and not constantly jumping from the CBA to the ABA to the WBL to the DLeague and then back to the CBA would be a great start. Looks like the NBA is starting to get it right, now all they have to do is make the league worth the player's time.