No central banker would disagree with the proposition that inflation is primarily a monetary phenomenon. Not one of them will disagree that every inflation has been accompanied by a rapid increase in the quantity of money and every deflation by a decline in the quantity of money.
Milton Friedman[T]he burden of government is not measured by how much it taxes, but by how much it spends.
Milton FriedmanThere's only one thing that all of the central banks control and that is the base, their own liability, and they can control that in various ways. They can control it directly by open market operations, buying and selling government securities or other assets, for example, buying and selling gold, or they can control it indirectly by altering the rate at which banks lend to one another.
Milton Friedman