That evil social security group was the only age group that voted republican against Obama (and by a wide margin), so why do you think that they support the democrats on the issues like SS reform, like your age group does?
They might not be voting Democrat, but enough of them opposed Bush's social security reform to kill it. As we have learned especially since Bush Sr. raised taxes, being an "R" doesn't mean you always support the right policy. The country needs to get behind any given policy and the way SS reforms were blocked under Bush was unconscionable.