Heidi, by saying “Disabled clients should have priority especially if they don’t have a car!” could very well be seen as discrimination against the able bodied, giving one group/category priority over another due to identifiable reasons will always be seen as discrimination.
I agree with most of what has already been said by others, there is no discrimination in what the manufacturers or dealers are doing, they are running businesses that operated on money and not good vibes and karma, money smells the same to all of them, no matter who is coughing it up, regardless of race, sex, religion and so on but remember that private buyers far, far, far exceed Motability customers.
Humanity is only humanity when all are treated the same regardless of their skin tone, religious beliefs and geography!