The Australian System is recognized by most as too complex, requiring Accountants and Advisors to work through the maze. A number of Austraians are on record, saying its only a matter of time, before adopting a system similair to NZ- simplicity being the key.

This article does not add too much, but it provides a focus on the issues

https://www.thepost.co.nz/nz-news/360560975/how-nzs-retirement-system-compares-australias