In a truly free market this would happen naturally and slowly equalize the wages in America and elsewhere. Given that the US government exists though it can artificially limit this process and require visas and work permits or else tax businesses that flee offshore.

Outsourcing has costs on it's own but it makes sense for America to artificially inflate those costs to maintain its consumer market. America eats the world and through doing so provides a lot of liquidity to the international market. Whether that is just or whether it should specifically be America is up for debate - but it does have the power for force others to play by its rules within certain limits.

Bare naked capitalism isn't so far off from an anarchic free-for-all with spiked clubs.