Here is a very revealing set of data on income based across percentiles around the advanced economies:
http://www.nytimes.com/2014/04/23/upshot/the-american-middle-class-is-no-longer-the-worlds-richest.html?rref=upshot&_r=1
I encourage you to play with the chart - for example take a look at Germany vs US comparatives. Set aside Norway - a petro-dollars-fuelled minor economy by all possible metrics (I challenge you to find any serious Norwegian company in the modern economic sectors space - there will be barely any in sight). And keep in mind - the article fails to mention anything about the exchange rates effects on the comparable incomes across the world.
Look also at Ireland and Finland...
