There is a reason the older folks are in charge. Look in native American's their chief is elderly and not in great shape. They have what no one else does, which is life experience. They are also not showing off or making rash decisions. Elders genuinely want to help the people prosper and leave that as a legacy.

To put in the requirements you suggested OP, makes you sound like you would rather have a dictator in a fluffed up generals outfit. There are plenty out there if that is what you are seeking. Please seek another land if you do not like ours.