Australians simply don't get passionate about religion or politics the same way Seppos do. That passion is generally reserved for sport.
In Australia political parties like Rise Up Australia, Christian Democratic Party, Citizens Electoral Council, One Nation are generally regarded as a bit of a joke by most people (those that even know they exist), and ignored.
In the US Bachman, Santorum et al. run for President...
Mind you the Secular Party of Australia got way less votes than the aforementioned far right religious nutbags.