Money is important, but there are other popular reasons why older Americans continue to work. Older workers are the fastest-growing segment of the U.S. labor market. The share of workers ages 65 to 74 and beyond is expected to keep growing through at least 2024, the Bureau of Labor Statistics says. But if you think money is why people are working past age 65, you’d be only partly correct. In fact, many, intriguing motives are behind this gray wave in the workplace. We consulted the latest annual retirement survey of workers by the Transamerica Center for Retirement Studies to uncover the top reasons why older Americans are working past the traditional retirement age.