The “Australia 2020 Summit — Initial Report” is available at: 
www.australia2020.gov.au/report/index.cfm
The Initial Report foresees, amongst others: 
A national and holistic tax system that is fair, simple and efficient to support the global competitiveness of Australia’s economy.
A comprehensive review of state and federal taxes within two years. This includes measures to simplify taxes and reduce inefficient taxes. 
Tax exemption [...]