There's no scarcity in fiat money because they can print how much they want. They're just want to control the money circulation to stabilize their fiat value, if they're keep print and add to the circulation, they will suffer high inflation rate. However the government has no choice when there's a crisis they need to print new money even though inflation will occur, because the gap distribution of money between the rich and poor is really far.
It seems that they have find a way, print money inside banking system to solve their liquidity problem, but never let them out to economy through high interest rate, to control inflation