Gould is a major critic of it. I think it is to stop wealthy clubs stocking up with expensive talent in the lower grades. I remember one season when Moylan was a junior they couldn't play him because of the 2nd tier cap.
I remember hearing that too, but if they can fit good backups into their salary cap, does it really matter?
Just seems like an admission that the cap isn’t equal across all clubs, and without it there would be more Benji Marshalls and David Meads waiting in the wings for an injury at Brisbane.