Australia and the US are very different places.
We have the 'right to bear arms' in our constitution. My personal take on that bit (2nd ammendment) is that it was allowing *states* (the US is a federation) to have their own militias - but once our Supreme Court interpreted it to mean *personal* gun ownership is protected, that's what it 'says' (unless we can get another SC to reverse that).
On top of that, our system was written specifically to make it hard to change, well, anything; they were taking the Roman Republic as an example.
All that said, politics are very different between the US and pretty much anywhere sane. Here in the US I'm a flaming left-wing liberal. I spent a few months in NZ; there my views are center to center-right. Stufff that's obvious there, like 'everyone gets a fair go.' just isn't a thing here. There are people who don't believe in evolution - but they're pretty darwinian when it comes to helping other people (picking the wrong parents and so being poor is their fault) - or protecting kids from guns
Sigh.