The RLIF should actually enforce a domestic player rule though cos it forces the NGBs to invest in a proper domestic setup and provides a development pathway for "domestic" players....it's all forms a integrated development strategy.
When we used the domestic player rules in 2006,2007 a few Welsh,Scots & Irish lads actually got signed by pro & semi pro clubs in England,Tonga played a couple of domestics in the 2007 RLWCQ comp held here in England,you would never have guessed they came from the Tongan comp,the winger played really well from memory..that's why it never made sense to me that it was Tonga that killed the rule for the 2008 RLWC..