I'm not so sure of what point you are trying to make, but I do know that the shrimpers were trying to argue that they needed those temporary foreign workers because the domestic ones wouldn't work for the wages they offered.
The point I was trying to make is simply that the big straw man in the immigration debate is that these workers are working cheaper, it is often said for "less than minimum wage," than American workers. It's a ridiculous proposition -- no immigrant is dumb enough to work for less than minimum for long. In the industry I'm most familiar with (the green industry) minimum wage is unheard of for anyone. Minimum wage is a myth, for most Americans and for immigrants as well. Surely there are exceptions. But exceptions shouldn't be touted as the norm.
If one wishes to take a position in the debate, let him not rely on flimsy "urban legends" for premises.