sigh, ian, we've been through this before with your crusade againt the import laws and importers n all.
unfortunately there are regulatory laws for cars as its kinda hard to kill yourself with a parallel import speaker or a camera which don't have to comply with australian ISO standards, or be tested for, nor covered by a warranty or quality control system... but a car that isn't quality tested most definitely can kill you.
There's nothing stopping anyone from applying to import a car that's not available locally, as long as they're a certified RAW who can demonstrate the required technical knowledge. Compliancers aren't just making money on cars, they are also liable for any recalls and defects that may be raised in the future. Technically they are the manufacturers of the car as far as the government is concerned. If something was to go wrong with the car, the buck would stop at them, and it is this gurantee that you pay for.
As for competition and import "slots"... are you kidding me? You couldn't give away compliance to an R33 with the hundreds of compliance workshops in australia. if a model is popular, there will be competition, if it isn't then the workshop can demand whatever the hell they want... like Modena Imports, who comply high end masserati's and ferrari's... no competition means they can ask whatever they want.
No system is ever created to please one person, and its unfortunate that it doesn't please you, but as with everything else in a democracy, its a compromise that sees everyone happy. I'm sure you'd love the thought of an american import system being put in place in australia.
Also new zealand doesn't have a local auto manufacturing industry... so its a free for all... you only need to drive down the streets of auckland to see the rusted pile of shit cefiro's and stagea's to realise there's no quality control there when it comes to what enters the country. Apples with oranges.