Though I don't think you have to be either a right-wing Christian or a feminist to object to the slavery of women in the sex industry. Feminist commentators or activists, will obviously be focused on global issues that effect women in particular.

As for right-wing Christians however, I've no idea what their bag is, but I'd have assumed anyone calling themselves a Christian would be concerned about human rights abuses in general - be that the slavery of women in the sex trade, or of children in Indian carpet making factories.