“Retirees (those who spend at least 20 years in the military and draw retired pay) can be recalled to active duty for life. However, the policy established in DOD Directive 1352.1 - Management and Mobilization of Regular and Reserve Retired Military Members, makes the recall to active duty unlikely for those who have been retired for more than five years, and those over age 60.”
Let 'em recall me back to active duty ... E-7s are getting a helluva lot more pay now than they were in my day, so then, when they re-retire me, I could draw my retirement pay with respect to the new increased pay scale ...