It's actually not the worst idea. Regulated, it could work.
1. Have an academy system wear players sign with pro clubs and are assigned to various amateur teams. Make it so are strict time limits on these contracts and that they are regulated while the kids are under 18 years old. No different from the ones foreign soccer players sign.
2, Make it so that any coaching and training fees are passed on in the contracts if the players signs with another pro team. Any club that originally signed gets a percentage of what the other pro team wants to pay. A pass on fee if you will.
3. Make the pro team also financially responsible for housing, education and any tutoring that is needed. Making a criteria where there are strict penalties both to the delinquent aspiring athlete and the team if they break these stipulations.
4. Once the kid is 18 is an adult and playing pro ball of some kind. They can be traded and their salary is a part of the team payroll which goes against the salary cap.
5. Make a relegation system of tiers where certain pro teams pass into lower divisions if they do not meet competitive guidelines. Reward success, punish mediocrity. The better teams get more of the cable pie and rights to be in exclusive tournaments.
Now that's just off the top of my head but it follows a similar path to the UEFA setup. But there is no reason why a system like that couldn't work here.