Why does an otherwise fairly extraordinary country (space missions, amazing inventions, lots of creativity) manage to get basic stuff so completely wrong (bad toilet plumbing, units of measurement, paper currency, health care, dodgy voting). You need a proportional system. On paper. With hand counting by volunteers overseen by party reps. Stop with all the private enterprise technology stuff. Democracy is too precious to contract out to some lowest bidder. The Australian Electoral Commission runs all our ballots here and I have absolute confidence in them. Have a look at how other places run elections.