As with one of your recent correspondents, I've also seen National's billboards "Delivering for New Zealanders", and doing some reflecting on that, perhaps more so on what National has delivered over the last 9 years they've been in government. A number of points come to mind.
Firstly, they've delivered a steadily declining number of Kiwis owning their own home. As both Labour and New Zealand First have highlighted, it's the lowest in 60 years, and raises the question, why? Applying a bit of logic to this makes it clear - because of National's unchecked immigration policy, far more migrants than what our infrastructure and economy can cope with have been allowed to enter and settle here.
This has created huge demand for housing, both for purchasing and for rental, far outstripping supply. Result - ballooning prices, significantly exceeding wage growth. Consequence - unaffordable houses for first-home buyers, and unaffordable rents for renters, especially those on the minimum wage.
Hence we currently have in excess of 40,000 functionally homeless people in New Zealand, of whom 24,000 are in Auckland alone. If only the minimum wage, the benefit and super were linked to an accommodation cost index instead of just inflation or the average wage, as it's obvious to anyone with half a brain that there's a huge disconnect between these and reality.
Secondly it's not hard to deduce from this that National's crowing about economic growth and a reduction in unemployment has been fuelled mostly by a) their immigration policy, b) natural disasters in the form of the Christchurch and Kaikoura earthquakes, c) property speculation and development, and d) booming tourism. Little to do with improving productivity, or adding value.