A government that allows US companies to manufacture good overseas, then sell the crap back on the American market got us here. We've cut our own throat.
While that doesn't explain all the non-manufacturing jobs that went overseas ... telephone tech support, etc., that provided a fair amount of lower income employment, you can point the finger of blame for the export of most industrial and manufacturing jobs directly at the management of trade unions. It's exactly the same principle as is under discussion about the minimum wage with workers who price themselves higher than the marketplace will bear.
People used to spend a higher percentage of their income on things that lasted years longer and/or could be repaired. Now everything is disposable.
There's a reason for even that, years ago labor was cheap and manufacturing costs were high - then things flipped, and I can buy a complete new coffee pot for less than I can buy just the heating element to repair the warmer, and that's before any talk of labor cost to do the actual replacement, plus whatever insurance the repairer has to carry in case it burns your house down, plus EPA remediation fees for solder fumes or whatever chemicals may be needed, plus FICA, Fedicure, and self-employment taxes ... etc. etc. etc. ad nauseum.