Most of the countires has the retirement age of a person to be 50 ,although some of them has the retirement age in the rage of 65 to 70.
These are applicable to public sector and private sector jobs.
Although this intro is well-written, I think that the opening sentence is too long. I suggest creating a short sentence with more appealing tone. What about this:
The expectation of retirement age varies among countries.
Let me give a try for the whole;
In some countries the average worker is obliged to retire at the age of 50 ,while in others people can work until they are 65 or 70.
Meanwhile,we see some politicians enjoying power well into their eighties.clearly, there is little agreement
on an appropriate retirement age.
The expectation of retirement age varies among countries. As such, some people argue that a group of 50-70 still can be company's intangible assets. In the case of politicians, the retirement age should be more than that of the people, since politics comes through experience. Therefore, I believe that workers aged 70 and more can be categorized as less productive workers due to no improved education among those ages.Hope this helps, eddy suaib