It is nothing about fairness here; as long as an American worker costs $25 per hour and a Mexican (or Indian, Chinese, pick any country) earns $6 the difference will move business that can move towards lower costs until you close the gap enough to not matter anymore. When a consumer buys a product, he pays a price for the product. You want it cheap, then you have to minimize costs and all is fair as long as it is legal (no sweatshops, child labor, conflict minerals etc). If one wonders why the American worker wants $25/hour and the Mexican one is fine with $6, I would like to see the answer here. But an intelligent one, not "a burito is 5 times more expensive in US than in Mexico", because that is part of the effect as much as part of the cause.