The balance of power is actually held by either the Government or the opposition. The independants are nothing unless the government or opposition are up to no good. If the Government and opposition stopped adopting a winner take all position then more legislation would get passed by the government and opposition combining to squeeze the independants out.
I don't mind a bit of bloody mindedness from pollies. Those from the backbenches in either the government are generally gutless and lazy and it is usually up to the independants to cry foul when the emperors have no clothes.
"Unrepresentative swill" - not likely, the Senate far better represents the aspirations of the voters than does the lower house where each seat is won on a winner take all basis. It is entirely possible, but unlikely, that a single party can win ALL seats in the lower house, whereas the Senators are roughly elected to represent the population at large. The 0.05%ers get in because at the end of counting everyone has had a gutful of the offerings by the main parties and the remaining crumbs are thrown to the minors. Ricky Muir had more votes than the Liberal and ALP candidates that he beat. Another prob is that the Liberals and ALP won't get together to fix up the mess they created with complicated, almost secret, voting deals that push preferences to the fringes.
The Shooters as a group are appalling as they don't negotiate but will go on strike unless they get their own way. Barrel O'Farrell should have told the Shooters, Fred Nile, Alan Jones and Ray Hadley to collectively shove it because they were trying to wag the dog.