Speaking to First Up, Impey shared his frustrations at what he said was unfair treatment of Pacific nations at the Rugby World Cup in Japan.
He took particular issue with the eligibility rules for tier two nations.
"I think the gap has got wider between tier one and tier two [nations]. I think World Rugby has got a lot to answer for in this space.
In particular I believe there should be eligibility rules which allow players who've played for tier one countries, such as the All Blacks, to go back after say a year and play for their countries of origin.