FACTOR PRICE EQUALIZATION.
The Germans have historically imported Turks and Poles to do the scut-work. They're now importing Chinese to do the thinking. "Germany is one of many European countries now dealing with the consequences of embracing a culture of very low birthrates." Here's the elaboration. The United States is still a net importer of scientists. Germany is a net exporter. Both countries, however, contribute to rising incomes in China. The United States benefits, however, from being a country in which the qualification for citizenship is ideological (buying into core principles, contested though those may be) rather than tribal, as is the case in all the nations of Europe.