Wireless isn't some magic pill which solves all woes
It's a pile of shite. Inherently, you are all sharing that bandwidth, due to the shared spectrum - it simply does not scale, coverage is limited to urban areas and it generally is unstable where there are lots of users and suffers from high latency everywhere.
Britain has one of the best 3G networks. Use it in central London, and you'll quickly see how slow and overloaded it is. Try and use it outside of an urban area, and you'll find you have no coverage. For instance, at my parents house out in the 'sticks' (yet within sight of the biggest telecommunications research institute in the UK), and not only can you not get 1G reception inside the house, but you have to wander about half a mile down the road to get anything.
A national fibre network is the only way to get high speed, low latency internet into every house - and that's what people want. Ask the Swedish, they've been doing this for years - live in the middle of nowhere? No problem, they run the fibre right to you.
Of course they pay a lot more in taxes. Perhaps the aussies should fund this by taxing the massive international conglomerates that rape Australia of its natural resources a bit more.