>If a person consistently chooses to buy TVs instead of food, I think that strongly speaks for mental problems.

That's not right. We're living in a world like this. When people cite stats that show x% of people living paycheck to paycheck that is almost guaranteed to be due to over-consumption and consumer debt if your household income is above, say, $50-60k/year. At that level, you have over-consume to have nothing left over.