The A-330 may do fine as a tanker, once converted, but it is far too expensive for the job. So is a new 767. We taxpayers deserve fiscal responsibility.
GB
Of course, you could just have less, 600 really is a surge full all out war against an enemy that doesn't exist kinda number. Or you could sort out that division of responsibilities crap which see's some airwings super busy whilst others doing nothing..
Lastly, not buying new would screw voters and job plans in AZ as well as profits for wall street..