FT has an article about "retirement" - worth a scan

In Japan, according to the OECD, in 2011, men leave the Japanese labour market on average at 70 and women at 67.

The UK’s Office for National Statistics estimates that people aged 50 to 64 accounted for about half the country’s increase in self-employment in the past four years. Those aged 65 and over make up another third of the increase.

Older workers and those in or near to retirement are going to be a huge feature of the coming decade. The FT has a long article about the subject. Sorry but it is behind a paywall. Here is the link if you have a subscription. Dick Stroud