Strong, data based response.
I have the data, but why don't you use common sense? What are people buying things with...their income. So how can they buy twice as much at they make? Why should I even have to get the data for such a stupid claim?
For the Kool-Aid Drinkers, the data:
In 2003 personal income was $9.2 trillion, personal consumption expenditures was $7.8 trillion.
If you want to be picky and add government expenditures, the total would be $11 trillion, which, according to my math, is not nearly twice as much as $9.2 trillion.
Stop being a lemming and use your head.