Hey Cut-Throat, I logged in to the Vanguard Voyager web site tonight. Right there on the home page is a link to a long interview with Ben Stein which includes a direct link to the site that has the irresponsible calculator you referenced in your original post. And Stein makes the following statement when asked about his advice for people approaching retirement who haven't saved enough:
"... If they think, "The market will run up; we'll take 8% out a year," that's a catastrophic formula. After a few years of a bear market, they'll have 20% left of their portfolio."
Yet the calculator on his site defaults to 8% among other problems. It underscores the importance of not relying upon financial professionals. And shame on Vanguard for spreading this junk. Things have gone downhill at Vanguard since Bogle retired.