Another look at the meaning. Excerpt:
https://www.wikiwand.com/en/Retirement
...More on Wikipedia..
https://www.wikiwand.com/en/Retirement
Retirement, or the practice of leaving one's job or ceasing to work after reaching a certain age, has been around since around the 18th century. Prior to the 18th century, humans had an average life expectancy between 26 and 40 years. In consequence, only a small percentage of the population reached an age where physical impairments began to be obstacles to working. Countries began to adopt government policies on retirement during the late 19th century and the 20th century, beginning in Germany under Otto von Bismarck.
...More on Wikipedia..