With the numbers given those are the ages of the people who can receive as part of the elder people which we call senior people would like to retire at that early age if they can but it depends on the kind of life what they have, if you raise already a good amount of money during that times you can now leave as you want and retire but what if not? people in the lower-low status of society can't choose this kind of life because they don't have any options they need to keep working so they can serve food every day and keep working hard for the challenge of life. Not all the time government can sustain those seniors at the end of the day it's their path of their life that make them keep alive.
Not many people can achieve the level of income that will allow them not to work when they want. Also, often the pension is not enough to provide themselves with everything they need and these people have to continue working.
Sometimes people continue to work even in retirement because they are bored of being retired without work, but this is also a very rare case, most often they keep going to the work because they need money. The retirement age is needed so that the government knows when to pay citizens a pension, but recently there is a tendency for governments to raise the retirement age, so people have to work until they are old.
that makes sense. Also, in my opinion, someone who enjoys their job and they don't have friends other than in the world of work, it is likely that they will continue to work not for money reasons, but because they have work friends who they consider to be their own family, and this happens in my environment where there are one parent who is elderly and he still likes to work also he has been warned to stop working by his family but he refuses because the reason he is in his job is that he finds pleasure that cannot be replaced with money, this indicates that money is not everything but everything need money.
It could also be that they choose to keep working because they are bored if they don't do the things they are used to doing, and it is possible that money is the number one thing, maybe they still like working for reasons like my story above.