Back in the late 80’s early 90’s the ruling class bought into the idea of the global economy. In order to compete with the Asian Tigers the USA needed it's own cheap labor pool thus NAFTA was formed and large multi nationals based in the US could utilize cheap (relatively) Mexican labor. Remembers that giant sucking sound? The results of NAFTA were somewhat encouraging (to the ruling class) so next on the globalist agenda was Chinas' huge market with plenty of really cheap labor. So China was brought into the global economy via perminate Most Favored Nation Status and entry into the World Bank. Well so far all is good for the ruling class, the ruling rich are getting really rich. But the American middle and working class have been priced out of the global economy. Until US labor is competitive with Asian labor job loses will continue.
It really simple, there is a over supply of cheap labor in the world and no one wants to use high priced American labor, all other things being equal. If your job (if you are lucky enough to have one) can be off shored or done by a robot the clock is ticking.
Soon the BIG adjustment for American labor will be upon us (You ain't seen nothing yet). Right now the Gov is subsidizing the American life style with borrowed money. But that can't go on much longer and when that collapses we will be face to face with what our ruling class, both D's and R's have done to us. It will not be pretty and payback will be a b*tch.