Most people I know over 55 still choose to work. Do people have so little faith in the intelligence and wherewithal of 'the old folks' as to think the government runs their lives?
Hubby's dad is a prime example. He retired at 60, and now works three jobs by choice. He's enjoying this form of retirement more than he ever enjoyed working before, because he can afford to tell his employers to pound sand at any given moment. He sets his own hours, his own limits, and does only the jobs he wants to do. For example, he's on 'days off' from the lumber yard right now because it's winter and he doesn't want to work the winter there.
He takes home a pay cheque, pays taxes, and shows up on these stats. That doesn't mean he 'has' to work.
My dad's gearing up for his 60th birthday, and aiming for a similar retirement for sanity and health sake. With arthritis in his back and hands, it's healthier than sitting at home, where he knows he won't move enough to keep ahead of the stiffness.