New Zealand isn't cheaper. If you compare it to SF and NY, yes it will look cheaper. But otherwise its costlier for some people(immigrants) who wish to come in.
Financially, its not important what you earn, its important how much can you keep/save.
From a financial perspective - NZ salaries are relatively lower compared to its costs of living. A well paid tech guy from India would save a lot more in SF than they can ever do in NZ. For talented senior developers in India, they lose financially by going to NZ. And lack of (job) options is quite visible.
From a non-financial perspective - NZ is one of the best countries to live in. But just that is not going to bring you the top-tech-talent.
Financially, its not important what you earn, its important how much can you keep/save.
From a financial perspective - NZ salaries are relatively lower compared to its costs of living. A well paid tech guy from India would save a lot more in SF than they can ever do in NZ. For talented senior developers in India, they lose financially by going to NZ. And lack of (job) options is quite visible.
From a non-financial perspective - NZ is one of the best countries to live in. But just that is not going to bring you the top-tech-talent.