Because middle class Americans used to make more money in relative terms, you have to work longer to afford the same things while at the same time our productivity as a whole has gone up. The rich have modified the system so that they take more out of companies and give less back to the government and as a consequence its much harder to climb the economic ladder without the safety net and with increased competition for scarcer resources.
Being able to send all your companies work to China is a big advantage for the company owner (rich) and a real problem for the American workers (middle class) if the rich don't have to give enough of that profit back to society.
What resource do you believe is more scarce than before?
Please be specific - name a resource that you believe average Americans consume less of now than in the 70s or 80s. Or, similarly, please name a resource that you believe middle class Americans need to "work longer to afford".
Also, shipping work to China is very good for the American consumer, who benefits from lower prices.
Being able to send all your companies work to China is a big advantage for the company owner (rich) and a real problem for the American workers (middle class) if the rich don't have to give enough of that profit back to society.