According to a Harris Interactive survey conducted for CareersBuilder.com, close to 3 out of 5 workers age 50+ intend to look for work elsewhere once they retire from their current jobs. The top 2 reasons given for continuing to work were that they could not afford to retire (44%) and that they needed health insurance benefits (33%).

Among workers age 65+, both men and women at all age breakdowns showed double digit growth in the percentage that were working full-time between 1994 and 2007. The percentage of working women
who were working full-time increased by 35.3% for those ages 65-69 and 17.9% for those age 70+ over this time period. The increase was 27.7% for men age 65-69 and 16% for those age 70+.

Murray Gendell, Georgetown University
Older Workers Increasing Their Labor Force Participation and Hours of WorkEmployee Benefits Monthly Labor Review, Volume 131, Number 1 U.S Department of Labor, Bureau of Labor Statistics January 2008 http://www.bls.gov/opub/mlr/2008/01/art3full.pdf