family assistance - if you would like to read into it the website is
http://www.workingforfamilies.govt.nz/ . As you can see it is quite common to receive this here, the minimum wage here is around 50,000 i think, but if you looked at the average wage of smaller cities and towns i dont think the averages would be quite so high as a lot of the high wage earners are from the bigger cities.
here is a bit of info from the site:
Working for Families
Working for Families is a package designed to help make it easier to work and raise a family. It pays extra money to many thousands of New Zealand families. Greater financial support is available for:
almost all families with children, earning under $70,000 a year
many families with children, earning up to $100,000 a year
some larger families earning more.