If you are referring to the Fed repo market operations, then these are short-term collateralised loans, so not really the same thing as pumping trillions in to the real economy.
A fiscal stimulus of that size would almost certainly drive demand (during a pandemic that has caused a negative supply shock) and therefore increase inflation.
A fiscal stimulus of that size would almost certainly drive demand (during a pandemic that has caused a negative supply shock) and therefore increase inflation.