As usual with politicians, they stopped following the Constitution in 1918.
Politicians begun trying to officially change it after a few years of Federation, however, once they realised that the the people were not stupid as individuals, (only stupid as the collective), they started manipulation of the system.
Billy Hughes was the first to succeed at being deceitful with the signing of the Treaty of Versaillies.
After this all proceeding governments of Australia, federal and state, all started manipulating the policies to aid their own agendas.
One example recently was the intro of the GST that proceeding governments have raided time and time again to reduce the peoples compensation rights again and again. in coming years they will have managed to successfully stop all compensation to the peoples of Australia that was originally “set in stone” when it was first introduced.