And those that choose to work under the table, or at jobs where they're tipped heavily, are not doing themselves any favors!
The one small thing I will disagree with finz about, is that SS is a much better "investment" than traditional insurance policies. Our benefits are not paid out of savings, but come from the contributions of those that are still working.
It is not uncommon for people that retire, to have to sell their homes and relocate to less expensive areas, or have to take out a reverse mortgage in order to be able to stay in their homes. When my grandfather passed away, we had to make a very tough decision, to sell the home he had built with his own hands, so that my grandmother could afford the best care during her remaining years.