There is an interesting article by Sir Geoffrey Palmer on the Spinoff Blog. It relates to the increasingly outdated Official Information Act. You can find the article here.
I don’t know whether you have ever used the Official Information Act. It can be extremely frustrating and, as Sir Geoffrey observes “With some ministers, the Act tends to lack support and acceptance. Some simply evade its requirements. Some public servants do not like the act either.”
If nothing else public servants are very good at evading the 20 working day initial deadline for responding, and for exaggerating the cost of their research.
In any case, if you are tempted to make your own Official Information Act request you may find this web site useful: https://fyi.org.nz/ You can make your request via the web site and also view requests/responses already made via the site.