People tend to vote more Republican as they get older (and wiser).
That's not remotely true and there is no evidence to support that claim.
What more evidence do you need than the percentage of olds voting Pub?
The current generation 65+ (Silent Generation) grew up mostly during the Eisenhower era and they are more Republican then their older counterparts (who are rapidly dying off) who grew up in the FDR era.
Case in point, Gore won the 65+ demo in 2000 and it has been shifting Republican as the Greatest Generation dies off.