The generational argument, often used by NZ commentators Bernard Hickey, in the view of this writer do not stand analysis. Every generation brings strengths, weaknesses, and adjustments, with each at the end of the day balancing each other out. This article contains a useful chart and is worthy of reading.
http://www.theatlantic.com/national/archive/2014/03/here-is-when-each-generation-begins-and-ends-according-to-facts/359589/