MikeAqua:
You don't know what the GHG is or isn't going to do and what the threshold is. I would guess it would have to be 'vital organs' stuff. Like the suspension of democracy scenario that you alluded to. I also think you're fundamentally incorrect about that anyway, because the law requiring elections is entrenched.
I mentioned Whitlam as example of a GG exercising their powers. Not because of the specific circumstances. Point is GGs have powers.
The whole argument about suspension of democracy is moot because any government that would vote to suspend democracy wouldn't care if the GG declared them dissolved. Apart from the very narrow Whitlam type situation, the GG is a pointless figurehead. The evidence of several hundred years of Westminster systems around the world says they are not going to intervene just because a law is bad.
But a court whose constitutional job it is to call out and block Parliament on unconstitutional laws absolutely will do so. Also, if your argument is that appointed positions cannot be trusted to wield any sort of power over an elected Parliament then I have some grave news for you about how one becomes Governor General.



