But the hosts flicked the switch 10 minutes before the break, Mateo Carreras finishing some superb work from Pablo Matera before skipper Julian Montoya breached the ragged Wallabies defence.
They came close to scoring again before the break but didn’t relent at the resumption, an early unforced error from Marika Koroibete gifting field position that led to Juan Martin Gonzalez scoring.
Pablo Matera’s try came after Schmidt had replaced his halves, who could only watch as Argentina hit top gear and Joaquin Oviedo’s try made it 38 consecutive points.
Koroibete was pushed into touch after halfback Tate McDermott put him through a gap, the replacement half doing it himself, tapping and darting through traffic to stop the rot.
There was still a glimmer of hope with 10 minutes to play, Argentina emphatically shutting the door in a devastating final passage that created some unwanted history for Schmidt’s men.
Juan Cruz Mallia strolled over twice in mere minutes and Oviedo added another to complete the carnage. Australia’s next assignment is New Zealand in Sydney on September 21.