The fact that global savers accommodate U.S. consumers by keeping U.S. interest rates lower than they otherwise would be and the dollar stronger than it otherwise would be is simply a manifestation of America's comparative advantage at supplying wealth storage facilities.
The Death of Money is an engrossing account of the massive stresses accumulating in the global financial system, especially since the 2008 financial crisis. Jim Rickards is a natural teacher. Any serious student of financial crises and their root causes needs to read this book.