We have elections every three years. In 2007 the Prime Minister was effectively sacked and his government sent to the back benches. Isn't that enough of a safety measure? Compulsory voting is a very effective democratic tool.I want someone who can, in extreme circumstances, sack the PM, or sack the parliament and call fresh elections. The PM should never be a law unto themselves, and should know they are not. Without that person in the GG (or President, or Queen or Galactic First Citizen-Emperor or whatever we call it) with the power to look over their shoulder they might start acting out of line.