Extract taken from "Seamer" reply

"it is not Australia's responsibility to prop up the NZ domestic competition. Allowing them into our competition will not help NZ essential problem - lack of a large, quality player pool"

If player pool sizes are going to be a yardstick to domestic team criteria , then the Australian domestic comp needs radical surgery very quickly because Tasmania and South Australia have the same essential problem as that "Seamer" eludes to "essential problem - lack of a large, quality player pool".
Australia needs strong quality opposition to keep public interest and the game flourishing on an international level I dont veiw it as Australia's responsibility but more as in Australia's best interest to help stengthen if NZ want it , the NZ comp.
We only have to look at this summers international cricket in Australia to see the public interest wane in over one sided competition even if it is their own team dominating.
Remember that Australia has one third of the population of England , thus less of a player pool. The quality of a stronger domestic competition also has a part in producing a stronger NZ side and hence stronger more interesting international competition.