I think a work visa would be a promising temporary solution, particularly since what we've learned from the research on trafficking in persons in Canada, regarding women who have been victims, is that Russian women, in particular, are highly educated and could easily find work. There is a myth that these women wind up in these conditions because they have no other choice.
These women are in tough financial situations, but they have an education that will enable them to find work and to have enough points to apply for permanent resident status.