Sorry to break the news to you. US tax payers, like you and me, are subsidizing the packages shipped via the postal service from China
One of the core reasons why US manufacturer's can't complete is that our tax policy favors gains from the speculative market, ie real estate and stock market, over the actual manufacturing of products. Another core reason is that the American consumers simply wants cheap products made in an authoritarian country that is actively competing with us militarily and economically, with the goal of becoming the dominate power in the world.
At the end, we only have ourselves to blame. We voted for the politicians who set fiscal policies that decimated our manufacturing base, and we simply like to buy cheap crap from China.
Keep this up, and China will bankrupt us in the coming arms/space race, much like how we did it to the USSR.