Senator McCARTHY (Northern Territory—Assistant Minister for Indigenous Australians and Assistant Minister for Indigenous Health) (15:02): Well, if there is one group responsible for cost increases and project delays in this country, it is the Liberals and Nationals. They spent a decade making oversized and undercooked infrastructure commitments across the country. They started building the Inland Rail without knowing— Opposition senators interjecting— The PRESIDENT: Order! Minister McCarthy, please resume your seat. Opposition senators interjecting— The PRESIDENT: Order! Minister McCarthy, please continue. Senator McCARTHY: Building costs have been increasing for a range of reasons, including a shortage of skilled labour and the increasing price of building materials due to supply chain issues. Wages and enterprise bargaining agreements are not the key drivers for inflation in this country. The PRESIDENT: Senator McKenzie, second supplementary?