Income statistics, however, don’t tell the whole story of Americans’ living standards. Looking at a far more direct measure of American families’ economic status — household consumption — indicates that the gap between rich and poor is far less than most assume, and that the abstract, income-based way in which we measure the so-called poverty rate no longer applies to our society.

That’s what W. Michael Cox and Richard Alm of the Federal Reserve Bank of Dallas wrote in a compelling presentation in yesterday’s NY Times (h/t). According to them (and referring to this chart helps):

The top fifth of American households earned an average of $149,963 a year in 2006. As shown in the first accompanying chart, they spent $69,863 on food, clothing, shelter, utilities, transportation, health care and other categories of consumption. The rest of their income went largely to taxes and savings.
The bottom fifth earned just $9,974, but spent nearly twice that — an average of $18,153 a year. How is that possible? A look at the far right-hand column of the consumption chart, labeled “financial flows,” shows why: those lower-income families have access to various sources of spending money that doesn’t fall under taxable income …. While some of these families are mired in poverty, many (the exact proportion is unclear) are headed by retirees and those temporarily between jobs, and thus their low income total doesn’t accurately reflect their long-term financial status.
So, bearing this in mind, if we compare the incomes of the top and bottom fifths, we see a ratio of 15 to 1. If we turn to consumption, the gap declines to around 4 to 1. A similar narrowing takes place throughout all levels of income distribution. The middle 20 percent of families had incomes more than four times the bottom fifth. Yet their edge in consumption fell to about 2 to 1.
Let’s take the adjustments one step further. Richer households are larger — an average of 3.1 people in the top fifth, compared with 2.5 people in the middle fifth and 1.7 in the bottom fifth. If we look at consumption per person, the difference between the richest and poorest households falls to just 2.1 to 1. The average person in the middle fifth consumes just 29 percent more than someone living in a bottom-fifth household.

They also explain that the quality of life we lead has been enhanced over the decades as products once too expensive for average families (cars, air conditioners, cell phones, homes) became more affordable as wages rose and prices dropped, which resulted in less time required to work to pay for these items. (Robert Rector at Heritage has made this point before). Finally, Cox and Alm take it one step further and also argue that globalization has been a net-plus contributor to this leveling effect.