To be more specific, over the past six years, the United States has run current account deficits that add up to over $ trillion, and these deficits have required an equivalent amount of financing from the foreign sector. One might have expected this borrowing to have led to equally sizable increases in the U.S. external debt, but this has not been the case.
If it is a tail event, and the world has just been unlucky enough to have 11 / 14  BIS central bankers' speeches  experienced a realisation of that tail event, then there would not obviously be a need to raise the inflation target.