Reading this all I can think of its not the politicians lying that made me lose faith in the system, but more both parties voting in human right violating shit.
It's very unlikely that this is the case for the majority of Australians.
I think it is more likely that these politicians vote for such policies is because so many people are disengaged. People didn't become less engaged with politics during the Tampa affair (in fact it was likely the opposite) and these recent trends certainly aren't causing it to happen now.
I'm not even saying that Triffit's idea will solve the problem but it would at least bring a level of accountability that exists in many other fields.