Fifty-four million Americans are over the age of 65. And extended life expectancies, coupled with low birth rates, are moving us toward a "super age" where more Americans will be over the age 65 than under age 18. With higher percentages of people likely to live well into their 90s, your retirement nest egg may need to last 30 years or more. Depending on how much you've saved and how you plan to live during retirement, you may need to make some adjustments, like leaving your full-time job at age 70 rather than 65 or working part time during retirement. In this super age, employers in particular will have to adjust to an environment where younger workers will be in short supply. Many will have to end ageist workplace policies and do what they can to retain experienced older workers or create attractive part-time opportunities for those who still have a lot to contribute professionally in their 70s and beyond.