Not entirely. Housing prices, college costs, etc. have all risen MUCH more than wages over the past 30 years or so. My father was a blue collar worker and my mom didn't work. In 1968 they could afford to buy a house on Long Island, NY on just his salary. The house cost $22,000 and he made a little less than $10,000. Translate that to today. A comparable blue collar wage might be $60,000 (in this area) while a comparable house is close to $400,000. All things being equal, the house should be about twice his salary, as it was back then, or $120,000. You just can't do it on one salary anymore, at least in this area.
I think you’re proving my point. If a blue collar job is 60k, multiply it by two. Since most households now have two incomes, housing prices reflect what those families are willing to pay. If you choose to only have one income (as we do), plan on not being able to afford many things - their prices are set by the demand of two income households.
On a brighter note, the percentage of income that families pay for energy (even gasoline) has dropped tremendously since 1968...but of course that is about to change.