Lend funds to institutions for the purpose of getting a return. Individuals holding their wealth but do not spend invest in assets but for those who avoid risk, individuals place funds on interest-bearing deposit funds
Business
Firms are more likely to deposit funds if interest rates are high enoguh that saving is more profitable than investing in expansion
Government
Governments tend to be lenders when the budget is in surplus. When this occurs, economic activity levels are high and the RBA and givernment implemet contractionary policies
International
Australia has had historically low savings rates and rely on overseas saving to finance domestic consumption and investment. Foreign liability is when money is borrowed from overseas