It should be free because they're over a barrel which has been explained a fair few times in this thread. Able bodied people have the option of walking, catching a bus, a train or a tram. Lots of disabled people don't have that option. We don't want to go down the road of "My dad is comfortably off so why shouldn't others pay?" I'll tell you why, because others might not be.
I mean come on, how many disabled fans do we have who park there? £12 a game might seem peanuts to the club but for some people it could be a lot of money. We are a wealthy club and adding extra costs onto people who have already been dealt a shitty hand in life is wrong. Personally I don't give a fuck how people try and defend this it is wrong.