The average age of a congregation's body of elders is going up, up, up, there are more and more "honorary" elders who just retain the title but who really can't do anything practical like give talks or make shepherding calls due to failing health. And there are fewer & fewer MS's to replace them, and fewer and fewer guys who even want to be a MS.
I smell some "new light" coming in the next decade or so. They'll go back to having a congregation "serivice directors" like in the days of Joseph Rutherford.
Lets not forget, Joe Rutherford (gods mouthpeice on earth) taught that the elder arrangemnt was unscriptural and that elders were "haughty" and "lazy". (Penton, Apocalypse Delayed)
I guess a broken clock is right at least twice a day!