A cautionary (true) story. After an article on the news, I am aware of some foreign workers working in the UK who were shipped in to work on the construction of a Temple here. They are stonemasons, and skilled ones too, but the principle rings true for any workers employed abroad to work here. Apparently the employees have contracts which were drawn up in their home country which stipulated a particular wage, which was a reasonably good wage for their home country. This wage was below the minimum wage set out in this country, and certainly well below the standard wage that local stonemasons would be paid. The contract also stipulated that food and accommodation would be provided for the duration of their work. Because the contracts were drawn up and signed in the stonemasons home country, it is still legally binding, and although the local Stonemasons Union are fighting for a fair local wage for these workers, there's nothing that anyone can legally do to ensure fair pay.