Normal text size Very large text size It is Australiaâs most important bank but it doesnât have any customers. You canât open an account with this bank, itâs unlikely youâll ever meet the manager and it doesnât even have ATMs. But the Reserve Bank of Australia is pivotal to the national economy. From house prices to wages, the Reserve (RBA) influences even the smallest financial transaction in the country. It does this through monetary policy â the interest rate set by the bank once a month that affects the cost of money. Anyone with a note or two in their wallet also has a reminder of the Reserve Bankâs other key function. The signature of the bankâs governor is on every note â it is the RBA that prints our colourful collection of currency.