my point was that it is easy to cherry pick one element of something that happens elsewhere, and wave it up as a success and ignore everything else that goes on in that place
Australia has CGT yes. They also are very rich and have great infrastructure and have shafted their indigenous population. Has CGT worked in Sydney? Has stamp duty? I personally have no idea. But I do know houses are very expensive there.
So should we copy Australia because they have it? Or because it has worked?
Having said all that, Australia is wealthy compared to us and taking a policy that they have and pasting it into NZ skates over a lot of factors that are also at play. You can probably quite easily tax Australians because they have economies of scale with everything. And they pull cash out of the ground. And everyone in the world wants to live there.
We, on the other hand, are a different kettle of fish. We aren't wealthy. We have opposition to a lot of things that could generate wealth (nuclear, mining, fishing, roading etc). It would be great if we could cut and paste a policy and make it work, but doing so just because Australia has it and does better than us ignores a lot of factors that help Australia to do well