" John Hewson pinpoints the moment he believes positivity in Australian politics died."
In the rough, that seems correct, it's about that time that politics did finally and completely become a plaything for power hungry and otherwise unemployable minstrels and mountebanks.
Australian looked on in horror as Labor took it all to the house of mirrors, smoke, shovels and intimidation.
What we can recover is anyone's guess.
God (in whatever form you perceive him or her to be) bless Australia.