As far as I'm concerned we should pick the best players who are eligible. If a quality footballer from overseas wants to commit to NZ I don't think that's substantially different to us running round trying to find random players who qualify to play for us. Genuine question, but how long did Tommy Smith or WeeMac live in NZ as kids? Wikipedia doesn't say but it can't have been much longer than 5 years. And don't forget there's current AWs based in Europe who get "injured" before games, and not just friendlies. Go look at our squad from the last OFC nations cup... So it's not like we have a lot of depth or even great commitment from our "real" NZ talent as it is
NZ citizen = NZer.
Which isn't to say that I think we should bulk import quality foreigners and wait for them to qualify but seeing as we only have one pro club that's unlikely to happen anyway.