The real savings aren't in turning Os into Es, but Es into Civs on the support side. All those finance and MSG airmen who can accomplish 100% of their tasks from a computer: turn em into GS-whatevers. 30 years to retirement is perfectly reasonable for clerks, and we can stop paying for GI Bill, TA, PCS costs, etc. As an added bonus, you'll reduce turnover and thus make them more efficient since they'll just repeat the same tasks for a couple decades in a row. Also, if they aren't in uniform I bet we'll find a way to leave them at home for the next fight, saving on deployment costs.