Retiring from Parliament last week, former Attorney General Chris Finlayson made a plea for New Zealand to adopt a four-year parliamentary term. It is a plea heard often before, usually from political insiders, seldom from the public at large.
When the proposal was put to voters at referendums in 1967 and 1990, they voted to retain the three-year term by majorities of 68 per cent and 69 per cent. But the suggestion does not go away.
It has much to commend it. Those who say a three-year electoral cycle is too short argue that it severely limits what governments can do. A new government is liable to spend its first year working out what it wants to do and its third year trying not to disturb the voters before another election, leaving too little time in between for taking steps that may be necessary but will not be popular.
Those who defend the three-year term prefer it for precisely the same reason: it severely limits what governments can do. Or to put it more positively, it keeps governments responsive to the voters.
They argue a short electoral cycle is in fact the only strong check on government actions in a country that lacks others such as a written constitution, a second chamber of Parliament or a federal system. Political power in New Zealand is centralised in a single chamber parliamentary majority.