Curious - who pays for the road tax and insurance on a Motability car? If that cost is paid for by the state, then the state has an obligation to make that cost effective, and if that means getting the most basic option which fits the needs of the person in question, why is that wrong?
Speaking as someone who has several family members - with spurious disability claims which prevent them from doing bog all except work - each with pretty nice new cars, one of whom doesn’t use it and rents it out to another (able bodies, yet also unemployed) family member because she doesn’t even drive.
of course I know this isn’t all mobility car users, but it doesn’t half stick in your gullet when you are out working, paying full whack and seeing this….