OK, everyone who is commenting about how Australia sucks, shut up. That's not what this is about.
Also, we have no say in who is picked to be Attorney General. Voting won't change that. If you don't know why we don't have an R18+ rating, do some research. In a vote to introduce an R18+ rating for games, all state's Attorney Generals were required to agree. South Australia's Michael Atkinson said no. The rest said yes.
Atkinson is misguided. His reasoning for saying no is that he "doesn't want kids to be able to get their hands on adult content" (or words to that effect). However, this has, in some cases, made it easier for kids to access 'adult' content. Take Borderlands for example. A fairly violent game that was rated 18+ in Europe, whereas in Australia it was rated MA15+ (The highest AU rating for video games).
In short, it's not our fault one person is a douche.