"It is potentially the biggest economic and social challenge we face. Yet it hardly registers in the popular debates. Within the lifetime of the typical Australian the number of people living here is expected to jump 60 per cent from 23.3 million today to 37.6 million by 2050.
Sydney and Melbourne’s populations are projected to explode by 60 to 80 per cent to reach almost 8 million inhabitants each. Perth’s size is set to more than double to 4.6 million within the next 37 years. But politicians, policymakers and the private sector appear unprepared for this radically different future."