If by "retire" you mean cease work totally, don't think that is an option for man today nor going forward.
Unless one has a rock solid pension along with investments and savings to keep the wolf away, don't expect to be sitting around waiting for god in luxury.
People simply are living longer and as such are going to need much more money to survive their "golden years" than was previously thought. Time was one retired at 65 and was gone from this earth (on average) not long afterwards. Now "70" is no longer seen as that old.
Many planners are urging those >50 or even >60 to start thinking of some type of work they can either do from home and or does not require a daily 9-5 routine. Did you know that the >50 age group is one of the largest entrepreneurs in this country currently?
Local PBS station had a program on seniors last week and it featured many >70 and in one case >80 years of age that are still working. The one that got me was a 90 year old woman who works at a local mall cinibon store. This woman gets up and drives herself to work each morning and opens that store up *by herself* to get things ready for the AM rush. This includes baking the buns, setting things up and so forth. Judging by the her customer's reaction (they mostly all knew her by name), they love her to death.
Will say something else. Anyone >60 today likely has known bad and or hard times before and how to get through them. Things so many take for granted today such as welfare, SSI and such simply weren't around back then. You either worked, saved and or invested, or starved, it was that simple. Persons of that generation didn't wait around for things to happen, but got up and got busy doing or looking for something to bring money in, even if it meant moving you and your family half way across the country. Debt and credit were dirty words as well. Rather than go into debt (owing people money), if you couldn't afford something you did without.
In some ways I really pity this younger generation with their high expectations and never having known hard times. Cannot tell you how many "older" people I know using up their savings to provide for their children, many of whom are living in the basement or in their childhood bed room.