If Australia provoked conflict by continued incursions into Indonesian territory, most nations would support Indonesia's position and not ours (including some of our closest allies). Most of that support would be economic rather than military and many would take action designed to cripple us rather than supporting Indonesia as such.
Or they stop buying our natural resources and again the miners have to sell within the country at a fairer price so our manufacturing sector fires up again. Again jobs jobs jobs.
Imagine the message Australia sending a few F18's to fly over Jakarta in a show of what we are actually capable of without any US Military hardware to help us out!
Any Asian Country targeting Australia would become a no go Zone for Aussie tourists.
Bali would be crippled.
The biggy of course is our alliance with New Zealand, I am joking although NZ would be with us 110% the Big one is the good ole USA who have a base in Darwin don't forget. Just imagine the devastation to the IDF if the Indonesian Air Force tried to attack Darwin with US warships there.

