Compulsory Voting
When it comes time for an election in Australia, everyone is required to have their say. If you don't turn up then you get fined, meaning that 95% of Aussie voters attend polling. That's compared to 36.6% in the 2014 US midterms. Those who don't wish to vote but also don't want to get fined usually void their paper by drawing phallic objects on it.
BTW, #18 is not 100% true. We pay more taxes than we need to the rest of the year to compensate for this. This is an old odd thing created so people could have more money for Christmas.