That's apparently a first - 6.6 million people over age 65 worked or looked for work in the first six months of the year, versus 5.9 million 16- to 19-year-olds. From the SF Chronicle:
Experts say that over the past decade older workers have tended to hang on to their paychecks longer, owing to sagging stock portfolios and falling home prices. This shift toward an aging workforce has been disastrous for 16- to 19-year-olds, who face unemployment rates of 25 percent nationwide and 34 percent in California, similar to the Great Depression. "It's killing kids," said Andrew Sum, director of the center for Labor Market Studies at Northeastern University. "We're tossing our future into the trash bin."
Perhaps, though older folks might not have much choice but remain in the workforce. Many of them have gotten killed by the recession and can't get along on just Social Security.