Goff learned that in some cases policies are worth little if they cannot be presented convincingly. Any faltering over something as critical as the economy will be punished. If there is even a tiny whiff that Labour's costings might not be reliable, it will not be trusted.
Instead of the economy, Labour is now heavily leaning on National's proposed sales of minority stakes in state assets in the final week of the campaign. It has begun an Armageddon-like countdown to the election day: "Six days until your assets go on the block if you don't vote Labour".
Unlike the Rapture (so far at least) the asset sales will actually happen when that day comes unless voters follow Goff's advice. However, while opposition to the asset sales is widespread it is not necessarily deep enough to force voters into changing their minds.
Still, at least Goff was talking about the issues that matter.
Just two days after saying the issues that mattered were the economy, health and education, Key was instead talking about Winston Peters, delivering his own Armageddon-like warning about the plague of locusts that would follow any return of NZ First to Parliament. The earthquakes were apparently just the forewarning.
All up Key was the person who would have been better sticking to the issues that matter in the first place.
Police are expected to sift through the offices of several media outlets this week in search of evidence around the recording of the conversation he had with Act candidate John Banks. Key has retreated to the moral high ground, claiming what people really want to talk about are the "issues that matter". However, he and Banks clearly didn't seem inclined to discuss those issues during their meeting. Paradoxically, had Key practised what he now preaches and stuck to those issues that matter rather than what appears to be Don Brash's future and the life expectancy of NZ First supporters, it is unlikely he would now face such protracted questioning.
On a lighter note, the next time Labour calls for Key to show them the 170,000 jobs promised, he could simply ask his Napier candidate Chris Tremain for a few.
Tremain's campaign includes a "30 jobs in 30 days" challenge.
He spends about four to five hours each day doing a different job, including milking cows, manning the bar at Napier's Shed 2 until 2.30am, and chopping up steers at the meatworks. Yesterday was job 26 - working in a fish and chip shop.
He said the hardest so far has been the meatworks and working on the garbage truck. And, no, he didn't find Goff's costings in it.