They all voted, it is the voice of the populace as far as attitudes to China go. Australians had the option of parties that were friendly to their largest trading partner. They chose the ones that were hostile. This isn't like saying the choice was neoliberal vs neoliberal. Being cordial to the Chinese is well within the spectrum of Western neoliberal politics that is acceptable to the bourgeoisie. You can find "We should be nice to the Chinese" opinion pieces in Bloomberg, the New York Times, and the Wall Street Journal.