Even New Zealand can't compete with pork from the 3rd world- not least because intensive pork farming is unaffected by climate and because external producers don't apply the quality and workforce protections required in the first world. Either the sector is conceded to the cheaper foreign producers or something has to change to justify more expensive local produce. Simple as that. Even if you can encourage the public to prefer local produce, sensible shoppers are trying to stretch their grocery $ and can't help being attracted to the 2-for-$5 cheaper brand at the supermarket.
"... They ne'er cared for us
yet: suffer us to famish, and their store-houses
crammed with grain; make edicts for usury, to
support usurers; repeal daily any wholesome act
established against the rich, and provide more
piercing statutes daily, to chain up and restrain
the poor. If the wars eat us not up, they will; and
there's all the love they bear us."
-- Shakespeare: Coriolanus, Act 1, scene 1
