Senator BIRMINGHAM (South Australia) (14:25): My question is to the Minister representing Minister for Department of Climate Change and Energy Efficiency, Senator Wong. I refer the minister to the submission to the government from the Energy Supply Association of Australia regarding Labor's carbon tax, which warns that: Systemic failure or financial distress among major retailers would increase volatility and risks in the energy market, reduce competition and potentially undermine system reliability and security of supply. Given the ESAA claims— Senator Cameron: Simon, why did you do a back flip on climate change? Senator Bernardi interjecting—