And it's up to us technically literate to develop and evangelize technology that will make it impossible for the Australian, Chinese or any other government to get away with this. As Bruce Schneier says, "It's not sufficient to protect ourselves with laws. We must protect ourselves with mathematics".
They will always find you if it matters for them to do so.
If you don't matter, sure, you can continue to hide in quasi anonymity in the noise. That's only because they don't have a reason to pursue you.
Authoritarian systems turn the people into the ultimate snitching devices. People learn to be careful with computing devices, it's your own trusted family or neighbor or friends that will burn you. Society gets sculpted to reinforce government policies. That happens in all authoritarian systems. You could even see it in the psycho-rabid mask people, in how batshit crazy irrational they've become. They're wildly emotional lunatics unable to comport themselves as normal humans. They can't think rationally any longer, because they've been driven into a frenzy. The propaganda terrorism scare tactics used on the US population after 9/11 had somewhat similar effects. Authoritarian systems always produce large numbers of those people, they act as an extension of the group/person in power to enforce ideology, laws, religion, behavior, you name it.