This has long been a concern of AFP and state police.
So let the cops make the case for ID checks at any and all State Border crossings and at checkpoints on roads and railways between major intra state cities, so that there is consistancy with seeing which fugitives are moving around the country. Let's see how far that gets them. It may well have been a concern, but they have done nothing to address it, but now there is a soft target because everyone is brainwashed into blindly accepting security restrictions when aviation is mentioned. And bonus! the cops can get others to do the work for them, and double bonus! the mug punters pay for it themselves!