The reasoning of modern monetary theory holds that countries with reserve currencies can maintain unlimited levels of fiscal deficits and public debt because they have financing available. The evidence, however, shows that massive deficits do not mean economic dynamism in the US.
After 2008, federal deficits have doubled from about 60% of GDP to about 120%. Emerging nations shift their resources to China through the US deficit instead of growing, since the world is one and the borders are all open, and trade is unrestricted.
US debt in nominal amounts is more than that of the rest of the world combined. So monetary inflation exists and hits first the most deficit countries, then the least, and finally the rest of the world as imported inflation.