The interesting edge case is that people like my dad -- who did sheetrock for a living -- would never ever have been able to make it to age 70 to retire. He knew the odds were slim that he'd make it to 67. He passed away in 2004 at age 54; my tribute to his memory: http://bit.ly/11K2Dsb
It's kinda disgusting that "America's CEOs" just don't think about and don't care about people like him. . . they and their minions that theoretically can make it to age 70 from behind a desk forget that the buildings they work in and the houses they live in were physically built by people who need and deserve to retire, too. But "America's CEOs" and others who are hellbent on accelerating their path to early retirement see only the numbers.