Investment gap or efficiency gap? Benchmarking New Zealand’s investment in infrastructure

The Infrastructure Commission explains that New Zealand doesn't get good value out of its infrastructure.

This is a long (24 page) but interesting read. Key takeaways are:

We spend more on infrastructure than we might assume – our rates of investment are in line with other high-income countries, or even a bit above-average
The quality of our infrastructure does not match the quantity of our spending, suggesting that we are comparatively inefficient in delivering infrastructure relative to other high income countries
There is a case to lift investment in infrastructure – but only if we can deliver cost effectively and achieve good value for money from our spending. This raises an important question: How can we do better? To address that question, we need to drill into the detail about how our investments are performing, in terms of cost-effectiveness and value for money, and what we would need to do differently to achieve better outcomes.
New Zealand to ensure that we are choosing investments that deliver economic, social, and environmental benefits at an acceptable cost, and independent advice on infrastructure project prioritisation.