That means governments must usually be formed on the basis of a coalition agreement between two or more parties - and if the party with the most seats or votes does not itself have a majority, they need not be included.
The parties which make up the coalition do not lose their identity and their separate view points and interests. They merely agree to work with each other and by supporting each other on most, if not all, issues, ensure the government has some stability.
But, consistently with the need for a majority if any particular law is to be passed, any one or more of the parties in the coalition can withhold their agreement to a particular measure and thereby prevent it from being passed if they do not support it. There is nothing remarkable about this. It is how the system is meant to work and it is entirely consistent with - indeed required by - the principles of parliamentary government.
So, in the present Coalition Government, any one of the two parties to the coalition agreement, Labour and New Zealand First - or perhaps three if the Greens were to be included on the basis of their general stance of supporting the Government on most issues were to be included - could withhold their support and prevent the passage of a particular measure, on the basis that without their support there would be no parliamentary majority.
When the coalition partners occasionally do not agree on a particular issue, there is no reason to froth at the mouth, or bemoan the fact that National, with the largest number of seats but not a majority, is not in government, or to ask, who is running the Government.
A coalition government that has to muster a parliamentary majority to get its measures passed is what both our constitutional principles and the will of the people, as represented by the outcome of the election both dictate; it is called democracy at work.
So, when New Zealand First declines to support a proposal put forward by Labour, or if the roles are reversed so that Labour fails to support something NZ First wants, we should celebrate, not fulminate. We have the best of all worlds - a more representative Parliament, a Government that has to take account of a wider range of opinion than just its own, and a coalition that provides stability and a consistent strategic direction.
Perhaps some of our commentators should pause to reflect for a moment before going into print.