But in the past three months, at least six South Korean nationals were found to be working unlawfully in the local sex industry.
"Australia used to be a popular choice, but recent campaigns and crackdown may have put them off going there," added Dr Song.
"The Korean communities in Australia considered Korean prostitutes a community and national disgrace."
A Korean woman, who is facing immigration and other charges, was told she could make $1000 working as a prostitute.
After being recruited through a Korean website, she was paid $600 towards her airfare to Auckland. She was picked up at the airport by a Korean taxi driver and sent to an apartment in Hobson St where she was given a short induction into the sex industry.
According to police records, clients were charged $220 an hour or $180 for half an hour, of which $80 was paid to the brothel operators, who are also Korean nationals.
Catherine Healy, Prostitutes Collective national co-ordinator, said most sex workers would not state on official documents that they worked in the industry.
"It is common sense for most sex workers to avoid stigma and discrimination by not stating that they are sex workers in official documents."