Its funny but I used to work on a diary farm, and I can tell you the quota system has a lot of advantages over other more wild wild west approaches, but even 20 years ago you needed to milk 100 head min to survive. This has not been for small operations for many years.
I would love if the system was updated to focus on price reduction/stability. Increase the quota (more milk on market = cheaper milk) and remove or reduce the limitations on import (but still block nasty US style hormone buffed products). I like our dairy quality but I doubt New Zealand has lax standards comparatively. I would think the extra cost to ship it here would make it a premium fancy type product anyway.