Agreed, but a separate set of actors. The FED can't do fiscal policy. They only have
• Money supply
• FED-controled interest rates
• Reserve requirements
• "Extraordinary vehicles" {Balance sheet utilization, the FED "discount window", etc.}
When the FED loosen's money supply, or reserve requirements, or lowers interest rates, or sells cheap debt, the effect is to push current consumption over current saving -- threatening inflation, threatening "too many dollars chasing too few goods", and thereby threatening the value of the fiat currency. The intrinsic dollar value then goes down, and U.S. goods/services look better on the global markets, and trade grows: at the expense of being able to draw on U.S. savings in the future.