There are some people who are passionate about their jobs. For these people, working is not only a way to earn money but also provides them with a lot of satisfaction. Therefore, people who are passionate about their jobs should not be required to retire since their lives can be boring and meaningless after their retirement.
In addition, some people still need money to support their family even after the age of 65. If they are forced to retire, they will lose their income and will not be able to share the financial burden of their family. The consequence can be serious. I know a person who was still working at the age of 64, because his son was unable to work due to his disability. After he was forced to retire at the age of 65, his family has really a hard time. In order to have enough money to pay bills, his daughter-in-law had to work fifty hours per week.
Moreover, for some positions, older employees are more suitable for the jobs. For example, for a chinese medicine doctor, a senior is more trusted by customers, because he is experienced, patient and pays more attention to details. Likewise, in universities, older professors are more welcomed by students since they have a lot of teaching experience and have more knowledge in their fields. It can be a big loss for