There is no easy answer to this problem that I can see.  I seem to be seeing an equal number of accidents of all age groups of late.  Yes. elderly are more prone to medical events, but they also don't use electronic devices as much as younger drivers do.  I've been behind some 20 year old's on their cell phones and they are clueless to what traffic is doing.  The problem goes both ways I believe.

About 20 years ago my wife came home with her car somewhat dented in several places.  It was an elderly 90+ year old male driver that had hit her, and several parked cars that were in his path.  There were witnesses to it and the police found him at Safeway on 18th.  He had no clue what he had done and the police said it was just a scared elderly man that had done it.  There was a bit more to it, as I think the police were afraid to do anything because of who he was.  As soon as I heard his name, I knew it sounded very familiar so I looked it up.  And yes, he had been a UofO Law School Dean.