Earlier this morning we referred you to an article about the increasing number of middle-aged American men who are opting out of the workforce.

At the same time, it appears that a typical middle-class fellow would have to work two jobs to afford to live in a major U.S. city.

Middle-class city dwellers across the country are being squeezed. …

In New York, the supply of apartments considered affordable to households with incomes like those earned by starting firefighters or police officers plunged by a whopping 205,000 in just three years, between 2002 and 2005. …

Firefighters who want to live in high-priced cities can work two jobs, said W. Michael Cox, chief economist for the Federal Reserve Bank of Dallas. “I think it’s great,” he said. “It gives you portfolio diversification in your income.”

Portfolio diversification in your income? So that’s like one-third in high-yield bartending, one-third in long-term firefighting, and one-third in short-order cooking?