If it would be such a big problem for Big Pharma they would stop selling drugs in NZ. Just to set an example for other countries if not for anything else.
"Big Pharma" isn't a monolithic entity with greater coordination powers than New Zealand. (The very largest pharmaceutical company, Johnson & Johnson, has $70B in revenue compared to NZ's $180B GDP.) Furthermore, NZ can make a credible commitment to act irrationally for a long time through the democratic process, while individual pharmaceutical companies are driven by shareholders to maximize profits with a time horizon set by interest rates.
