The NCAA can't do it. What if the long-awaited union between the Big Ten and SEC could?
Is that a monopoly acting in restraint of trade? Or is it a market actor governing itself for its commercial benefit in a competitive landscape?
Say the Big Ten and SEC dedicated a percentage of their TV revenue to set up an NIL consortium of their own providing a substantial wage floor for the revenue sport athletes within those two conferences, available to any incoming player for four full years so long as they remain a student in good standing, and the schools forbade transfers between one another. Not a sit out year, no transfers period.
Players can transfer in from outside the Big Two. Players can leave the Big Two freely (but would be giving up their TV contract money to do so, and are entitled to that money whether they're on the team or not, so they don't have to accept a Creaning). But within the Big Two, once you choose a school, you (and the school recruiting you) are locked in for good.