Getting older does not cause conservatism. That is a myth promoted by conservatives.
[H/T to @mattalhonte for the referenced article: "Seniors Are More Because the Don’t Survive to Become , By Ed Kilgore"]
Intelligencer
Poor People Often Don’t Survive To Become Seniors Who VoteA new study suggests that one reason seniors are more conservative politically than younger cohorts of Americans is that poorer people don’t live as long and suffer from health conditions that inhibit voting and other forms of political activity.