This week's result shows the mood for change is trending upwards, the strongest support for legalising use coming from the 18-30 age group (43 per cent) and the over-60s (35 per cent).
Prime Minister John Key says changing the law would send the wrong message to younger people. To me, they're getting a worse message from the present drug laws. It tells them that unless you're brown, or blow cannabis smoke in a policeman's face, you have every chance of breaking the law and getting away with it. The Law Commission in 2011 estimated 400,000 Kiwis breached the cannabis laws each year.
An in-house Treasury document from 2013, released under the Official Information Act, sums up the situation.
"Current policies do not appear to be effective at reducing the rate of illicit drug use."
It said only 6 per cent of cannabis users come to police attention and, of those users who were arrested, 95 per cent continued to use it afterwards.
The paper pointed to the hypocrisy which allows politicians to legally indulge in their drugs of choice - tobacco and alcohol - even though, says the Treasury, they "are consistently found to be more harmful than some illegal drugs, such as cannabis".
It points to anti-Maori bias - they make up 14.5 per cent of the population but receive 43 per cent of the convictions for cannabis use - and that in 2005/06, the police spent around 600,000 hours and $300 million on illicit drug enforcement.
What the report doesn't rub in is that the police would be better occupied on other matters, such as trying to catch more burglars. Last year, for example, police admit that 59,845 burglaries went unsolved - that's 164 a day. In the Auckland Police District, the success rate was just 6.2 per cent.
No wonder a growing majority believe it's time our parliamentarians called an end to the open season on pot-heads, and freed up the police to chase real criminals.
The Drug Foundation favours replacing the current punitive regime with the decriminalisation model introduced in Portugal in 2001 to fight one of the worst drug epidemics in Europe.
The Portuguese decriminalised minor drug offences for all drugs and set up a public health and social support programme under the five pillars of prevention, dissuasion, harm reduction, treatment and reintegration.
Offenders have to appear before dissuasion panels made up of a lawyer, social worker and medical professional. Most cases are simply suspended. Drug use did not explode following the change, and now tends to follow the trends of other European countries.
The latest poll suggests more New Zealanders now favour legalising cannabis use, rather than just decriminalising it. More importantly, it highlights that two-thirds of us want change, a majority for reform that has stayed consistent for at least 16 years. Why don't our politicians get the message?