It's not from the government, it's from a Senator who isn't a member of any political party because he's too much of a piece of shit even for the far right who were initially willing to have him.
There are two things to consider here. Australia's federal senate uses a very complicated system of transferable preferences which means people can end up being elected despite receiving very small proportions of the vote. Secondly, Anning wasn't elected, but took the spot of a different member of his former party who was barred from serving.
There's lots of racism in Australia and the far right is certainly resurgent. But it's the same as it is in the US, UK, Europe, Canada etc... they're posting on a lot of the same sites, listening to a lot of the same people. Anning isn't evidence that there's something special about Australia in this regard. Similarly, that Australia is very likely to have a left-wing government soon isn't evidence that the symptoms that led to Trump, or Brexit, aren't present.
Well, Queensland, but see above (and DrSlek's post).