When has this happened? When?
Remember that time before unions and minimum wages? It was called the 19th century. Real wages still rose at speeds that hadn't been seen in the history of man up to that point.
"Race to the bottom" in terms of wages displays a fundamental lack of understanding of how the markets work. Most people today are not being paid a minimum wage, how can you explain that if you believe the floor is the only thing preventing most of us from being paid $1/hr.