Ms PLIBERSEK (Sydney—Deputy Leader of the Opposition) (15:03): My question is to the Prime Minister. NATSEM modelling shows increasing the GST to 15 per cent would mean a family on about $26,000 a year would pay more than 20 per cent of its household income in GST, but a family on about $170,000 a year would pay only 8.8 per cent of its household income on the GST. Why is the Prime Minister intent on putting the highest burden on low- and middle-income households?