The other thing to take into account is the second-hand market will go back to normal when the car manufactures get themselves back together.
So lets say in a years time things have settled down but mean while Motability have increased the GCB by £100 would it be fair for those who do not renew or cannot renew there cars for another 3 to 5 years when Motability would need to put the GCB back down again because the used car market has slumped.
I don’t think linking the GCB to retail sales would be a good thing though of course I’m sure part of it is in the equation somewhere.