Do they print more money to do this or move around money that already exists?Government stimulus is how you get checks sent to people.
Monetary policy achieved by buying/selling bonds on the market is not in any way equivalent. For reference, there is 1.75 Trillion in physical cash circulating right now. The banking system creates a force multiplier on that amount making the amount of effective cash circulating much, much higher, especially in our modern electronic world.
I've been attempting to do that. They are not paying money directly to banks. They are increasing the amount of money in circulation. There is a gigantic difference between the two things - they're not directly paying or subsidizing anything here.
Money is the medium of exchange, it's the blood circulating via transactions with things being bought and sold. When an economic shocks hit, the speed at which money is circulating will drop, and this risks seizing the markets up completely like a heart attack. Inserting more liquidity via additional cash into the market temporarily is not "paying the rich", it's pumping more blood in to help make sure the heart attack isn't fatal.
(has econ degree)