fe45a3b1_lian_Broadcasting_Corporation___Definition
[Term] Consumer price index [Definition] 
Measures the inflation in the price of goods and services. Important to the budget because higher prices mean more GST revenue, although they also mean higher increases in government payments indexed to CPI and higher costs for government purchases.
Budget 2014: Tony Abbott opens door to 'horse-trading' with minor parties in Senate to pass key measures - Federal Budget 2014 - ABC News (Australian Broadcasting Corporation)
Definition