Nope, it's got nothing to do with that unctuous twat Mr. Tony "let the brown buggers drown" Abbott.
Nor has it anything to do with the musings of the vicious cxxt Gina Rinehart.
No, Australia's one and only contribution to civilization was a court decision rendered by one Henry Higgins more than one hundred years ago.
Judge Higgins decreed that a working person was entitled to a living wage.
And in spite of the best efforts of the Abbotts and the Rineharts of this world, that's still the law in Australia.
That's why the minimum wage in Australia today is more than double the minimum wage in the USA.