The Socceroos beat Syria 2-1 in Sydney last night, and will now need to beat Honduras - the fourth-ranked team from North and Central America - over two legs to book its place at Russia 2018.
"In 2014 we were able to get four boys and four girls from Borroloola to Brazil for the World Cup".
Former Everton captain Cahill has come under fire after scoring his 50th goal for Australia because of the way he celebrated moments later.
While Australia were favourites going into Tuesday's game, it was by no means a dead rubber and by dropping Mooy to the bench he was disrespecting Syria and the player himself.
Cahill is the small business' newest ambassador and held the pose long enough to show it off to the packed ANZ Stadium and plethora of press parked on the sidelines.
"It is just speculation", Cahill said. 1-1 - scores were back to equal and the game was back on.
Football Federation Australia were scrambling to ascertain all the facts after the bombshell broke on Wednesday, with chief executive David Gallop understood to have been unaware of Postecoglou's intentions. "Congratulations Tim!", the holiday agency posted to its 7000-odd followers.
The Melbourne City striker scored twice in the World Cup qualification playoff tie on Tuesday morning, including a goal in extra time to earn the Aussies a 3-2 aggregate victory.
The goal came after the Syrians punished Australia's sloppy play in the centre of the park, Mohammad calmly dispossessing Mark Milligan before surging towards the home side's defensive line and feeding the ball to Al Soma, who finished ruthlessly.
Check back here for updates as the match unfolds.
His crowning achievement was mentoring the Socceroos to a first-ever Asian Cup title, beating South Korea in the final on home soil.
Suddenly Aaron Mooy was warming up and on the pitch, his hugely controversially omission lasting a mere 10 minutes.
"It is never going to be easy".
In the short-term, the news that Postecoglou is already planning life after the national team will disrupt preparations for the two matches against Honduras in November.
As significant as Al Soma's early goal was, the loss soon after of Brad Smith was to have a major impact for the Socceroos.
"Back in 2006 at the World Cup you saw football really grow (in Australia) with the A-League", he told the BBC.
'Great player. Cheap act. I just want us to focus on the positives.
"He is definitely moving on after November, " a source close to Postecoglou said.
The game will be broadcasted live on FoxSports and on Network Ten's free-to-air channel - ONE.
Losers, though, can often expect little sympathy, and the pressure is building on Ange Postecoglou.
Whoever leads the Socceroos into the World Cup (again, should we get there) has to be someone willing to trust his players and be prepared to pay ugly football to get a result.