"Forget 2012: Long-Term Demographic Trends Favorable to Republicans"

[iemitsu]

54. Besides, people don't get more conservative as they age

unless they faking and were never liberal in the first place.
My parents did not become conservative thinkers or voters as they aged and it hasn't happened to me either (or to my wife).
That "old saying" is not a reference to changing political affiliations, it refers to youthful participation in social behaviors and physical activities that older folk are likely to consider fool-hearty and condemn. The reference is to ideas and behaviors we out-grow. That is why, "we become more conservative as we age" seems verified by what many experience.
I believe that people are more inclined to be consistent, over time, in their thought patterns, and their political, social, and economic attitudes than they are to dramatically change them.
People can change, of course, but since it takes effort to accomplish, few ever do it. Otherwise the changes we observe as we age are probably attributable to wisdom or knowledge gained, over time, through experience.
Fox News and the Republican Party would like us to generalize the notion that we become more conservative with age and follow suit politically, as individuals. I'm sure their hope is, that through constant repetition they can make the idea a self-fulfilling prophesy, that our subscription to that idea will make us become more conservative.
But, people's political attitudes are fundamental aspects of their personalities and, I suspect, are formed pretty early in life.
As a result, those who identify as "conservatives" will not disappear in the future any more than liberal thinkers or those who spend little or no time considering anything political or intellectual.
But whether or not what I say is valid, the demographic trend republicans need to worry about is not the increasing numbers of old people, it is the youth, they don't look like the old people.
Somehow it seems unlikely that we, a generation who has gotten what we wanted, will vote to end or diminish benefits that we earned and that we need so that the rich can live like kings (on the profits of our labor). And since the increasing numbers of ethnic Americans seem disinclined to vote republican, I think we can assume that the future is not bright for the ideas and policies promoted by the Republican Party.
No, republicans, we are not going to become like you as we get older. And worst of all, your conservative children, and their children will have to live in a world where we, and the increasingly brown kids and grand-kids we spawn, are in charge.