Every human being has needs, physical, mental, as well as spiritual; of which, some of those human beings have been placed into or find themselves in, or have through hard work earned their place thereof -- in which they are in meaningful control of their own fate, through for instance, familial connections, networking, hard work, educational achievements or through various other means. Then there are those unfortunate others, that number in the hundreds of millions upon millions, that are born into unfavorable situations, with little or no opportunity, but yet, have the same basic needs of those that are living life in a stable and satisfying manner, of which their human needs consist of, but aren’t necessarily limited to, shelter, healthcare, clean water, food, companionship, freedom, education, and the right to worship.
Because we now live in a world in which everything is seemingly interconnected, this thus indicates that those that reside in the most advanced civilizations, which typically are often far wealthier than other lands, as well as more times than not, these wealthier nations being also the most powerful, or well placed, we clearly see then that there is before us a distinct pecking order of those that are the effective masters of the world, that is the rich and powerful nations, and all those others, thereof, who are the servants to those masters. Those then, that have little or no power, yet have an abiding desire to live, will, given their limited number of choices, do what they have to do in order to survive or suffer instead the consequences of having nothing to possess and no real escape from their doomed fate.
So then, in the lust for ever greater profits as well as market share for those that are the largest and most influential corporations in the world, they well recognize that because people all over the world, need employment, that foreign labor markets have become, in effect, wholly subservient to those that have the capital and the employment opportunities, thereof; of which those so contracted to those corporations must work under the conditions so dictated by that corporation. The upshot, then, is those jobs which are the dirtiest for employees in the sense of pollution and the like, as well as those jobs that are dangerous in regards to the safety of those so working at, along with those jobs that are most demeaning in the sense that the jobs involve work that no self-respecting person would ever consider so doing, unless compelled to do so by a whip upon their back, then these jobs end up being filled primarily by those that have no real alternative other than to do that dirty, dangerous, and demeaning work.
In summary, what has occurred in the present day is that the domestic parent corporations, to the degree that they can do so, outsources as much as possible all the work that they can which is dirty, dangerous, and demeaning to those countries, that are not in any negotiating position to do much of anything but to accept the terms so demanded, in return for employment of their people; of which, the main beneficiary becomes those corporations, who are able to increase their profitability and their market share, through their ruthless exploitation of those that are non-domestic, all under the guise of free markets and free labor, as if somehow this is morally right, when it clearly is not.