 In the early 19th century British authorities decided it was best to have lower-class white, Asian, Middle Eastern and Aboriginal women service the prisoners and thereby keep peace while maintaining strong class lines that isolated British gentlemen and ladies from the lower elements.Prostitution was so profitable that it was easy to circumvent the legal boundaries.When Australians took control by 1900 they wanted a "white Australia" and tried to exclude or expel non-white women who might become prostitutes.