Party Hierarchy of India during 2007-onwards

President of India -> Sonia Gandhi
Prime Minister of India -> Sonia Gandhi
Chairperson of Congress: Sonia Gandhi
Governor of states ruled by Congress -> Sonia Gandhi
Chief Minster of states ruled by Indian National congress -> Sonia Gandhi
Decision makers on deals in India -> Sonia Gandhi

Logic of Retirement, please explain

In India, average human being is retired from his job somewhere at 60 because it is felt that due to age factor will greatly reduce working capacity as well as decision making capability of a person, but a politician who have been given responsibility to work for country doesn't have any retirement age. Please explain.