That's not correct - prostitution is fully legal here in New Zealand. Sex workers are covered by sex-work specific occupational health and safety regulations, pay taxes on their income, have government-mandated workplace conditions, can get insurance against workplace injury, etc. It really is "just another job", apart from societal stigma (which is gradually declining too).

See:

https://en.wikipedia.org/wiki/Prostitution_in_New_Zealand

http://www.business.govt.nz/worksafe/information-guidance/al...