In the 1950s and 1960s, the median income allowed you to live with a single earner -- normally the husband, with the wife typically working as homemaker -- and roughly three children. It permitted the purchase of modest tract housing, one late model car and an older one. It allowed a driving vacation somewhere and, with care, some savings as well. I know this because my family was lower-middle class, and this is how we lived, and I know many others in my generation who had the same background. It was not an easy life and many luxuries were denied us, but it wasn't a bad life at all.

Someone earning the median income today might just pull this off, but it wouldn't be easy. Assuming that he did not have college loans to pay off but did have two car loans to pay totaling $700 a month, and that he could buy food, clothing and cover his utilities for $1,200 a month, he would have $1,400 a month for mortgage, real estate taxes and insurance, plus some funds for fixing the air conditioner and dishwasher. At a 5 percent mortgage rate, that would allow him to buy a house in the $200,000 range. He would get a refund back on his taxes from deductions but that would go to pay credit card bills he had from Christmas presents and emergencies. It could be done, but not easily and with great difficulty in major metropolitan areas.