What motivates a bank to lend anyone money in the first place?
It is interest. Interest drives the creation of money today. Any time money is created through debt, a need to create even more money in the future is also created. The amount of money must grow over time, which means that the volume of goods and services must grow over time as well. If the volume of money grows faster than the volume of goods and services, the result is inflation. If it grows more slowly — for example through a slowdown in lending — the result is bankruptcies, recession, or deflation. The government can increase or decrease the supply of money in several ways. First, it can create money by borrowing it from the central bank, or in America, from the Federal Reserve. This money ends up as bank deposits, which in turn give banks more margin reserves on which to extend loans. You see, a bank’s capacity to create money is limited by margin reserve requirements. Typically, a bank must hold cash (or central bank deposits) equal to about 10% of its total customer deposits.
