Another thing is that central banks do not pay for market interventions (or anything else) by simply 'printing money'. This is inflationary and has not been done in 40 years. Sure, the money they give the banks for their securities is fiat currency printed by them, but all money is created like this. The money the use to pay for market interventions such as this is primarily raised via foreign exchange market interventions. This is they way all central bank activity is funded, because as you know the CB is independent of the executive and receives no funding from government.
