That stuff happens everywhere, and by definition, is illegal. In fact. those women have few rights at all due to residency/citizenship status, and is normally brushed under the carpet by the authorities, who normally try to ignore first, , deport second, and charge (the women) third. But thats because their maggots, and has little to do with a nations laws, these kinds of exploitation, are invariably illegal-making new laws isnt going to help, and the (previous) link is very one sided. You want to find the real problem, have a look at the treatment of these women by the authorities.