A Central Bank attains its commanding position from its governmentally granted monopoly of the note issue. This is often the unsung key to its power. Invariably, private banks are prohibited from issuing notes, and the privilege is reserved to the Central Bank. The private banks can only grant deposits. If their customers ever wish to shift from deposits to notes, therefore, the banks must go to the Central Bank to get them. Hence the Central Bank’s lofty perch as a “bankers’ bank.” It is a bankers’ bank because the bankers are forced to do business with it. As a result, bank deposits became redeemable not only in gold, but also in Central Bank notes. And these new notes were not just plain bank notes. They were liabilities of the Central Bank, an institution invested with all the majestic aura of the government itself. Government, after all, appoints the Bank officials and coordinates its policy with other state policy. It receives the notes in taxes, and declares them to be legal tender.
As a result of these measures, all the banks in the country became clients of the Central Bank.12 Gold poured into the Central Bank from the private banks, and, in exchange, the public got Central Bank notes and the disuse of gold coins. Gold coins were scoffed at by “official” opinion as cumbersome, old-fashioned, inefficient—an ancient “fetish,” perhaps useful in children’s socks at Christmas, but that’s about all. How much safer, more convenient, more efficient is the gold when resting as bullion in the mighty vaults of the Central Bank! Bathed by this propaganda, and influenced by the convenience and governmental backing of the notes, the public more and more stopped using gold coins in its daily life. Inexorably, the gold flowed into the Central Bank where, more “centralized,” it permitted a far greater degree of inflation of money-substitutes.
— Murray Rothbard; What Has Government Done to Our Money?