In Australian Democracy why do you need to vote and how does it bring about change?

Question

In Australian Democracy why do you need to vote and how does it bring about change?

Answer 1

Yes it is against the law not to vote but it isn't against the law not to enrol so if you don't want to vote you don't have to.

What amazes me we are democratic country why wouldn't you vote for whats best for your country some countries don't have that priledge unless you don't care enough about your country to make the effort thats why you need to vote.

Answer 2

I believe it is against the law to not vote in Australia and that you can be fined.

Not something I agree with myself.