David McGee, a former Clerk of the House, has written the definitive book on parliamentary rules and practice in New Zealand. Yesterday in this paper he made an appeal for new rules to keep MPs in their seats for a full term.
Early resignations have become so common since the adoption of MMP, he feared that "increasingly, membership of Parliament is seen as being at the convenience of each member, perhaps more accurately the member's party, rather than as an obligation undertaken when elected".
This attitude seems rife among list members, who can be readily replaced by their party without a byelection. But electorate MPs have also resigned in greater number since 1996, some taking advantage of the rule that no byelection need be held if a general election is less than six months away.
McGee suggests these trends should be discouraged by requiring electorate members to post a bond they would forfeit if they did not complete the term, and setting a rule that a list member could not be replaced, which would reduce the party's votes in Parliament.
The rule for list members would probably work, the House is normally finely balanced and no party wants to relinquish a vote. A bond might be less effective. MPs determined to leave would probably bear the cost. But first the question needs to be asked, do early departures really matter?