This matter has been examined in detail by the Joint Standing Committee on Electoral Matters. Everyone has a view on this. It depends on where you sit. There are some who say the barrier should be very low to encourage participation, and there are others who say the barrier should be quite high to make sure we have serious candidates. No matter how you look at it, we have a system that gives us some very interesting candidates at every election in Australia.
On July 26th, 2016. See this statement in context.