ABC News | Population growth inquiry up for discussion after Liberal senator airs concerns about infrastructure ABC News Australia's population is set to hit 25 million in August, and Liberal senator Dean Smith wants to start a discussion about how infrastructure is going to keep up with demand. Key points: Dean Smith wants an inquiry to look at how to improve population ... Australia 'in the grip of ethnic activists', former PM Tony Abbott claims Dean Smith, Tony Abbott urge population debate to stop government perishing Australia's population tipped to hit 25 million years earlier than forecast |