Guest workers welcome in US?

This article explains the Guest worker policy that is taking place in the United states. Especially in California, this is very popular. Many employers can hire workers from Mexico who are egar to work. Many believe that these forgian workers are paid significantly less than American workers but the example giving in the article lists wages for guest workers to be between $7.50 snf $8.50 an hour. Guest worker visas also allow these workers to remain in the US for a little under a year, mostly doing seasonal work for farms. The question this rises is--will the guest worker policy will weaken the American job market in the long run? Under this policy do you believe that the number of persons entering the US to find work will increase, or it will just happen in the open and there will be less illegal employment? The article explains that many of the guest workers are employed in jobs that are not popular with American in the area. Is it a better plan for the US to move more business' south of the boarder or to allow more guest workers in the US? Would moving business' south weaken the pull that these companies have on the Economic world?