"The RNLAF's equivalent organisation (the closest any other nation has to the MAA) has a serving 1 Star DG..."
Quite a few European nations besides NL have a similar approach to the MAA, e.g. France, Sweden and Finland; and on other continents, Australia and Canada also come to mind. I don't know of any that are as independent as some would seem to prefer. Haddon-Cave made a mini-world tour looking at a few of these MAAs before writing his report.
As an aside, the last incumbent for Director of the NL MAA was Air Commodore Chris Lorraine, a Brit.