[mths]

> I don't lose much besides the right to vote.

I think you mean the obligation to vote. :) Aren't you paying more in taxes and/or losing out on social benefits if ever desired? Say you want to buy a house, larger stamp duty? Have kids, less/no subsidy? Something something medicare benefits?

[incompatible]

I can't get certain benefits like for unemployment, but can sign up to Medicare (and the age pension, in future.) Well, I can always turn to crime if I run out of money, right? Resident non-citizens can buy houses, but pay an extra tax, but there's an exemption for New Zealanders. The Australian citizen partner can help with the stamp duty reduction for first-home buyers.