The biggest problem here in Australia, at least in my opinion, is that voting is compulsory. Plenty of dickheads vote here because they have to without having a clue what's going on to begin with.
Our last government which was ousted earlier this year, set new levels in being complete and utter assholes to the average worker by making it way to damn easy to fire people. Lots of people lost their jobs under that system. Our new government who is every single bit as clueless and in many ways, quite a lot worse, basically rode into power by promising to overturn that one piece of legislation. So, in my mmost humble of opinions, they got in via revenge voting instead of logical thought because as all australians are going to find our pretty quick, these guys plan to screw you even harder, but with a less personal touch.
Plenty of other reasons, of course, why we end up with asswipes in power. In this case, I'm just concentrating on federal and it's pretty much the same thing either way. Last elections I was tempted to decide via a coin toss because we were fucked either way.