THE state government has established an economic audit group to conduct a wide-ranging review of the operational and financial performance of the WA public sector. The group consists of former secretary of the Department of Prime Minister and Cabinet Dr Peter Shergold, chief executive of Australian Capital Equity John Langoulant, PricewaterhouseCoopers partner Cathy Nance, state under-Treasurer Tim Marney (pictured), and Director General of the Department of Premier and Cabinet Mal Wauchope.