You're going overboard.
Canada has one of the most lax requirements in the whole world for immigration and residency. It doesn't take years. Some people (who are not rich nor have high skill levels) get residency almost immediately, and furthermore, work and student visas are very easy to get. This isn't the United States.
Your claim is so fantastic, it's difficult to believe. Name the place! Also, why did you and your boyfriend, who were so concerned for these women, not contact the police and reported the previous owner then?? If your concern is for the public good, then do it.
How are they different? The diff between a pimp and an mp owner is that the pimp has hooked the girls on narcotics, and mp owners don't. Pimps don't have city licenses, mp owners do. While both may profit handsomely from what they do, so do the girls. If a pimp or mp owner drives a mercedes, it's probably because they were in it for the money only. If a girl rides the bus, despite her huge tax free profits, she's fallen prey to the easy money lifestyle and (typically) squandered her money. If you're trying to make the point that an mp owner has unduly exploited the girls, you're insane. 99% of mp girls are there on their own accord, conduct sex to a manner that is satisfactory to their own safety, charge whatever rate they want, have the freedom to leave anytime, and usually pay nothing to work there. That an mp owner drives mercedes and a girl takes the bus, is an inequity that is completely the fault of the girl - if you can even call it an inequity.
By the way, I personally know a few mp girls who drive mercedes (convertible at that), bmws, and have paid off a few homes. Too bad they weren't all this smart.