President or top excutive of any organization if continue for ever, then what it reflect about the organization?

In the democratic counties various political parties have their own constitutions, that never allow the top excutive or so the President as permanent ones, but fix some time factor for them to remain in action.
Even it is generaly seen that in Britain, USA, and other democratic countries this is the rule for fixing their schdule for some period only.
But if in an organization there is noticed that only one is repeating its turn always, is very strange.
It may raise doubts in the public minds that the organization is either one man show or it has not up to standards for a change to the globalization goingv in the world , or till now after so many years it has no such personality to guide or rule over the programmes in the organization.