(Of course, you get a completely different attitude where opposition member's bills are concerned. There, the slightest inconsistency is highlighted and brought to the attention of the House. Which they should be, but it makes the partiality of the government's advice on its own bills all the more glaring).
Shadow Attorney-General Chris Penk thinks the solution to this is for the opposition to issue its own section 7 reports. While I expect they'll be every bit as partial as the government's ones, but in the opposite direction - a lawyer being someone who says what you pay them to say - this certainly isn't going to hurt. Competition may force the government to better justify its position, rather than being propped up by the artificial authority of office, and voters will be able to judge for themselves who is credible and who is not.
But if the goal is actual impartial legal advice to the House, so it can fulfil its duty of properly scrutinising legislation and engaging with and fixing any threat to rights and freedoms, then its obvious that parliament should use its own lawyer, rather than rely on one who works for someone else. In other words, we need to take the job of advising the House away from the inherently conflicted and partisan Attorney-General, and give it to a properly-funded Officer of Parliament. We could also task them with reviewing old law for consistency, and reporting to the House when the courts make a declaration of inconsistency with recommendations on how to remedy it.
This would cost a few million - the Parliamentary Commissioner for the Environment costs $4 million a year - but it would be worth it. And hopefully someone will take the idea and put it in a bill.