PBS had a program recently about the Nazi's T4 program, where disabled people were rounded up and euthanised. Physicians who signed the euthanasia papers often didn't even interview the patient/victim, they relied on med reports sent up the chain of command.
I know about the T4 program.
Those who don't know history are doomed to repeat it, as the old saying goes.
However, we don't even have to look at history. We have a shining example in the Netherlands. If the doctors decide a person's care is too much trouble, they can kill that person, no questions asked, and the families' wishes can be totally ignored. As it stands now, a Dutch parent who takes a retarded child to the doctor risks having the doctor kill their kid.
I have a tape of "Selling Murder," about the Nazi eugenics program. I think it was on The Discovery Channel."