Prime Minister Stephen Harper used an address to the Australian parliament, which included senators watching from the gallery, to criticize the way members of Canada's upper house are chosen. "As one Canadian political scientist I know likes to say, when we look at Australia, we suffer from 'Senate envy,'" Mr. Harper said. "Because in Canada, Senators remain appointed, not elected. They don't have to retire until age 75, and may warm their seats for as long as 45 years." Australian senators are elected and serve terms of up to six years.