CPI calculates the inflation of prices of common goods, so it doesn't address the point DDragon made (that the purchasing power of consumers lag behind the increase in price). Whether the second part is true I am not sure. I had a quick look at the article, and it seemed more interested in talking about the distribution of wealth growth.
Was there a part I should be reading, D.Dragon? Or did I have to calculate backwards with the "64%" growth to find the yearly growth? I can't remember if CPI was calculated compoundly, and if not - which year it used as the base year.