I'd be very careful with making comparisons across the different countries. First I'd want to have a look at the data and understand whether those differences are truly real. The other thing you'd want is to equate for general wealth across the two countries in order to understand if you're going to have those sorts of similar differences.
I don't think anyone here is really saying this is a model you should replicate holus-bolus here in Canada. If you missed my introductory remarks, they were about what New Zealand has to offer. What its experience teaches is essentially some of the structures you might need in place in order to get control of costs.
If you have a very careful look at moral hazard and whether or not it's really an issue with copayments here in Canada, you might find you don't need a copayment system.