see my other comments later, what I meant was all PR and citizens are "tax residents" and most of their income is not "tax exempt", however EVERY international student is NOT a "tax resident".

read the ATO website. I asked
@LANKAT to do the same but he doesn't want to do so and keep commenting bullshit.
I think he(the OP) can include himself in an exempt category.

If I was an international student then I'd find a way to do so within legal limits, because even if I pay taxes as an "international student" he will not get much back in return. That's not fair to me. And whatever income he referred to is not generated from Australia(I guess so). For these reasons, why he should pay income taxes?
He can do whatever he wants, but I showed him possible pathways.
And this comment is wrong. No need to pay double taxes.

If I'm wrong show me that.