Since we all have tax file numbers (vaguely similar perhaps to your social security numbers), and the government knows where we live and what we earn etc, it's pretty easy.

Everybody is registered to vote automatically when they turn 18, and jury duty is really easy to get out of.

Come election day, you turn up at a polling point and they check your name off in a massive book. If your name isn't checked off, you receive a lovely fine in the mail.

Of course there's always ways around it, and mistakes happen etc, and If you've fallen off the voting register (which can happen, eg by changing address and not updating your details) and you haven't voted, you can pretty much never go back on it / vote, because when you do they'll retrospectively apply any fines that you've accrued by not voting in the meantime. In the lead up to an election, print and TV media is bombarded with ads reminding you to make sure your voting details are up to date, because if they aren't, fines will be issued, etc.

So in some ways, similar to yourselves, voting is a right of all citizens; it's just you're expected to exercise your right to vote, which in generally makes the system fairer because the party in power really is representative of the majority.

We also like to vote and have our voices heard.

edit:
It always amuses me the people who are hard and fast supporters of a specific political party. I'm a democrat, I'm a republican, I'm a liberal, I'm a labor supporter.

I vote for who's making the most sense to me and my life at the time. I've voted for both of our parties in Australia at different times over the last 18 years of my voting. American media would call me a swing voter, but I tend to think that's should just be normal.

I don't know. It just seems strange to me to follow a party for life.