I don't like rationing but I think it's here to stay, and as Britgirl said, there's not a lot to be done about it with the present NHS system. Mind you, there's a lot of talk (implicit and explicit) on ER about rationing, so even in a completely privatised system (where in theory the money is there) you get rationing, though I guess it's less dependent on your postcode.
As for *involuntary* euthanasia, that's one to be tiptoed about very carefully. Voluntary Euth is all well and good - there's a certain degree of control over what is happening to you and all, but with invol euth you are opening up all sorts of potential for meddling in a Pxs wishes. Basically, if the Px has made a living will and they state under what circumstances a DNR should be issued under etc, go with it. But I think there needs to be a big ethics discussion here, especially because things are rarely black and white in medicine.