1. As Nobodys Rep says it probably needs to be voted on to bring in suhc a dramatic change to the rules and the big clubs who are currently taking advantage of the system have the most power and will be looking out for their own interests.
2. As the boys in question are effectively still children I would imagine there would be some employment contract hurdles to overcome. You cant just hold a childs registration agaisnt their will in the same way you cant hold onto an adult players registration ie the Bosman rule.