Consumer borrowing fell for the eighth straight month in September. This record-setting streak is due largely to tightening by lenders, unemployment and the conservative preference to pay down debt rather than spend. This widespread fit of fiscal responsibility, economists fret, could prevent a recovery from taking root, since consumer spending is responsible for 70% of the U.S. economy. This conventional thinking, of course, overlooks the fact that an eventual increase in spending that isn't fueled by consumer spending will yield a recovery that's more likely to last.

According to the Federal Reserve, borrowing fell at an annual rate of $14.8 billion in September -- it's biggest drop since July and much larger than the $10 billion predicted by economists. The behavior is exactly what you'd find in people worried about losing their jobs or focused on rebuilding safety funds and investment portfolios. Those who want to borrow are finding banks won't be complicit this time, as they clamp down on lending practices.

Consumer debt levels fell again in August for the seventh month in a row. Facing continued instability in the job market, people are paying down their debt, as a way to protect themselves. Savings are up, and borrowing is down – which could weaken the recovery. Consumer spending accounts for 70% of economic activity in the United States.

Total consumer debt outstanding dropped by $12 billion in August, according to the Federal Reserve, reflecting an annualized rate of 5.8%. Reality outpaced Wall Street's expectations, which were around $10 billion. In July, consumer debt outstanding fell $19 billion (9.1%), which was the largest in hard-dollar terms since 1943 and on a percentage basis since June 1975's 16.3%.

While consumer fear is playing a significant role, as a touchy housing market and dicey job situation leave little to lean on, the banks are also responsible for the change in direction. They aren't lending as easily, with stricter standards limiting the amount of credit available to consumers. You can't spend what you can't borrow.