Our Constitution is markedly different from that of the USA, so its a good idea to actually read it, before comparing Australia with the US, particularly when it comes to legality or illegality of government, or the judiciary.
As for the legal system being profitable, this is the case where the state governments collect revenue from fines, for example traffic fines. Local governments can also make money from the collection of revenue from such fines as parking infringements, etc.
Much of the money collected from fines, on a state level, is used in providing police officers, and equipment, which most people do not object to.
It is the elected members of parliament that make the laws, not the judiciary. Legislation is put forward, and passed or not, after debate.
As for governments and doing business, a good example to look at would be the ongoing saga of the once government owned telecommunications company, Telstra. This has been partly privatised, (floated as a public company) and is now not exempt from competition, and no longer has a monopoly on fixed line infrastructure.
As I said to Bf, it most certainly does make a difference in my country, whether there is a conservative or socialist government in power, in regards to the power given to big business, but, I will say, that this difference is becoming a lot less pronounced than it once was.
People do care, and do pay attention, many do not like change for the sake of change though. "If it ain't broke, don't fix it". If people don't like the way things are, they will change it, and they will do it in the quiet and unassuming way that Australians do. We've seen various politicians try American style politics here, and they fail every time.
I've seen on this forum, those who think the world is going to end, and everything will collapse, and we will be back to the stoneage. I've seen those that disagree with the current crop of Conspiracy theories, being demeaned, called sheeple, unaware, ignorant, stupid, blind, etc etc. This does not make the Conspiracy believers right, or the theories that they spout right.