This is just a starting point for NZ wages and salarys.

Below the Government website are a few useful wikis

http://www.careers.govt.nz/jobs-database/whats-happening-in-the-job-market/who-earns-what/

See also

Money and Banks and House Prices and Mortgages and Rents

Driving in NZ (Including Fuel prices)

Food in New Zealand (Including Basic Food Costs)

Thinking of emigrating to New Zealand (Advice and Tips)

http://www.trademe.co.nz/Trade-me-jobs/Salary-guide/index.htm