I have to ask, are you employed by the RAF to drive for a living? MAA, whilst irritating is not a major drama. Now, should it cause you stress and unnecessary anxiety you could hand back your FMT600. Each time you need to travel ask for a driver. That way there's no risk of an accident through you worrying about an inadvertent MAA, and the MT drivers get some trade. Should there not be enough drivers then they'll hire more.
If you feel bullied and harassed into driving I'm sure there are people that can explain that route too.
An Air Officer recently told us in Lincolnshire that until the system fails they will keep applying the pressure, until they know the limit. Read between the lines and all becomes apparent.