If an industry or industries, in this country hires cheap labor in another country, either they eventually destroy their customer base here in the US or create a new one overseas, but will have to sell their goods for less defeating the original purpose.
it will be the civil workers keeping the economy going, and paying most of the taxes as well, at least one can hope....( I say this because I find federal/state/school/etc pensions and medical benefits to be outrageous seeing as most people nowadays will have neither)
It is possible for the size of the pie to grow; for productivity to grow; and for all of us (who try) to grow economically.