Prime Minister John Key said he didn't think prostitution law reform had worked in New Zealand.
Mr Key made the comments on Radio Live when asked about the Chow Brothers' bid to build a 15-storey brothel and hotel building in the Auckland CBD.
Mr Key said he didn't think the Prostitution Law Reform Act 2003 had achieved a reduction in street prostitution and under age prostitutes.
"The argument was that it would eliminate all the street workers and underage people, particularly girls, and the reports that we see in places like South Auckland is that it hasn't actually worked.
"I think it's been marginally successful, if at all," he said on Radio Live.