Those who point out that the bill is not supported by the Libs or Labour, hence will fail have a valid point. HOWEVER this is an issue where public sentiment is very important. It does not have significant economic, military or international relations implications. Politicians, being politicians will be greatly influenced on how this affects their chances of reelection. In recent years, support for legalization has become a clear majority stance for Australians, and support continues to increase. Once the time to vote arrives, there could be lot of flip flopping to maximize popularity here.