Labour is concerned people haven't had enough time under MMP to decide whether they should keep it.
A referendum on the voting system was one of National's promises heading into the last election, and MP Simon Power believes New Zealanders deserve the opportunity to say whether it is working for them.
Labour MP Charles Chauvel says it's only been in place for 18 years and that's not enough.
A referendum asking people whether they are happy to MMP or want a change will be held at the general election next year.
Labour has reason to fear for the end of proportional representation – in both the 1978 and 1981 elections they received more votes than National, but due to the FPP system, National got to form the Government. These kinds of rsults are what led to MMP being adopted.
RadioLIVE / 3 News