You know why? Because no one wants to notice. No one wants to talk about Social Security and its problems, its Ponzi nature, its quietly ticking time bomb(s). No one wants to talk about it because we have come to believe that these sorts of things eventually work themselves out. And certainly no one wants to talk cuts, or means testing, least of all the people in Congress who would be slaughtered (likely) at the polls if they did.
So no worries.