I will strongly agree for consumer purchases by people at or above the median household income in America. Strongly disagree for medical purchases, since if you try to save money you may die.
I'd love to see some numbers or studies to prove your claim as it applies to Americans in poverty. Even some anecdotal math would be fine, using craigslist apartments and bus ticket costs and food costs and medical costs and etc. Poverty line is 23,050 for a family of 4.
November 2012: 20% of American children live in poverty