There is no shadow of doubt that due to the health care improvement the average human life has increased, consequently people's ability has increased to work in higher age than previous generations used to work. Permitting people to be employed after 60 has many benefits and drawbacks.
There is a number of arguments in favor not forcing people retire. Firstly, the experience they have got during long career will be lost, while some can work until 70 or even 80 which all of us can see in the private business sector. Secondly, the income for retired people is usually less than what they were paid during employment, which is inconvenient for some, who are ready to do more efforts and in the same time they need money to cover their responsibilities. Finally, some people live through their work as the work value for them is everything in their life and it is their first priority, they do not work for money.
On the other hand there are some disadvantages of having no upper ceiling for employment age. First, new generations have the right to find an employment chance. In addition, new generations should hand over careers from the older generations to get a new blood or new thoughts. Moreover, for those who can to work after retirement age they can do it in the private sector.
In conclusion, I believe, retirement age is a very important point for a lot of people and it is strongly recommended to be definite by 60 or 65; however, for over talented people or those who are in real need to work we may permit them to work after that age.