It remains unclear to me why you say that the wise men of today are lesser than the wise ones of the past. Does this claim rely on objective facts? What kind of wisdom are we talking about here?

Also, as far as I can see, the system you describe cannot change very quickly because great men are anyway rare in history and, it seems, the only way to reverse the opinion of a great man is through the opinion of an even greater man (which also becomes more difficult if wisdom just decreases from one generation to the next). So changes should become extremely rare over time. Is this a correct conclusion?