This is nonsense. I'm not aware of a single New Zealand podcast made available on a paid basis, and few that are produced in New Zealand contain musical elements - because RIANZ almost always denies permission.
As a citizen of New Zealand and a producer of a podcast for the last 8 months, I have personally 'spun' over 150 songs. All songs have been entirely legally played and a small number have been by New Zealand artists.
PLEASE remember that the RIANZ are only a part of the music scene. Many, many artists world wide are avoiding or releasing themselves from the draconian powers of the RIAxx organisations and taking their lives into their own hands.
Check out the following (with which I have no financial relationships).