BINGO! The fact that most families now have two wage earners has helped mask our relative economic decline, as shown by the fact that we've gone from having a third of the population taking home roughly 45% of the GNP in wages in the postwar period to the situation of today, where those two numbers are reversed. In real dollars, wages have been largely stagnant for decades. Of course, this purely economic analysis doesn't take into account all the family and societal problems caused by the need to have two wage earners instead of one in a family.
Is that your feeling? Or do you have a factual source?