I sometimes say it is coming first to Israel and Singapore (and England?), but the Kiwis are a different case. Eric Crampton quotes from an NZ Ministry report:
Overall, there is no evidence of any sustained rise or fall in inequality in the last two decades. The level of household disposable income inequality in New Zealand is a little above the OECD median. The share of total income received by the top 1% of individuals is at the low end of the OECD rankings.
You also will note that New Zealand has been a steady under-performer in terms of economic growth, despite a lot of good policy decisions. This has helped keep income inequality down.
On this note, the paperback of Average is Over is coming out August 26th, you can order your copy here.