My NZ passport is good for less than 4 years. As a teacher in China I have to apply for a Residence Permit for the term of my contract, which is usually for 12 months. To get that the authorities require that there is 12months left on my passport.
As the documentation process takes some time I would say that my current passport is good for only somewhere south of 4 years.
I cannot see how the government can justify selling me something that gives less than half the value of the previous arrangement.
10 Year Canadian Passports
10 Year Dutch Passports
10 Year Nz Passports
Department Of Internal Affairs
Kiwis In Aussie