Debb Carlson may be the new face of the American worker. After a layoff, the former special-education teacher's aide is stitching together a living from four part-time jobs. They don't pay all the bills, but they help her survive. "I have been doing this since late September and I have still not found a full-time job. It's terrifying. I am in the fourth month of arrears on my home," said Carlson, 59. So she works in a day care center, then as a fitness instructor and a personal trainer, plus she's a personal-care attendant for a health care facility. She's...