Academics in New Zealand wanting to use individual-level publicly collected data to look at questions of public policy interest have two basic options. They can request a Confidentialised Unit Record File from Statistics New Zealand for the Census or other collected data series, or they can request access to the data lab to get closer to the raw data.Just look at the ACS data and how easy it is to access. Go to IPUMS, set up a free account, click the box that agrees that you will use the data for good and not for evil*, and then you can use the same SDA interface for the ACS data that you're of course well familiar with from the US GSS data. You can run regressions on the 2013 ACS sample, or cross-tabs, within the web browser. To do the same thing in New Zealand, you would have to specify exactly what you wanted to do and get prior permission for each thing.
* There seriously is such a box.