Why hasn't there been many good jobs lately in usa?

i think it's cause of many factors but mainly cause corporate cutting costs any way they can to raise profit margin, keep labor as cheap as possible while using the least amount of capital but at the same time maximize profitability (sending jobs overseas to less regulated governments allowing less taxation and less environmental regulation and less legal system to protect the workers to reduce conflict with the workers) while at the same time paying off members of congress though lobbying, keeps the rich ceos and politicians happy to cut everybodys throat