australia australian house of representatives australian labor party career deflation disinflation edmund phelps employment franco modigliani government gross domestic product inflation james tobin john curtin john dedman keynesian economics linda mcquaig macroeconomics mainstream economics margaret thatcher marxism milton friedman nairu organisation for economic co-operation and development phillips curve potential output prime minister of australia profession reserve army of labour stagflation standard error totalitarianism trade-off unemployment wage slavery white paper william beveridge