Is that really what the Australian people want? I'd guess they just don't care either way, but in that case why would the Australian politicians push for that? Canada has a pretty similar apathy towards politics but even then we don't see the government forcing Canadian citizens to implement backdoors or raiding the offices of a broadcaster. (Yes the recent C-36 and C-10 bills are pretty disastrous in that regard but they are very recent and face quite a bit of opposition)
It's such a peaceful country too, so the entire "hard on crime" policy does not make sense to me. Is it a partisan issue in Australia or is it something both parties agree on?