People are also old, sick and dying people are also in the process of aging in fact, the process of aging and machine wear and tear process is relatively similar. If the fast approaching obsolescence is not retired. Must he die at his post? At that time. It is very unfavorable to both public and private.
And people. Is emotional and not like a machine. That's why it's important to retire at a certain age. Appease your body and mood. Usually called retirement. Dedicate most of your youth to. Society. Later in life is only a short 20 years 30 years. Think about it is a little sad.