I think it is a brilliant idea which, I believe, has been running in NZ for some time.
If you are brown bread then losing a few of your organs is the last thing that would be on your mind. I carry a full donor card with me most of the time but I do occasionally forget. Not having my name on the opt-out database will means that whatever happens my organs can be whipped out PDQ. It is unfair and time consuming to ask, already distressed relative if one can harvest the organs from the corpse. Can't see the point of burning or letting perfectly good organs rot and without wishing to be harsh and insensitive, it is hugely selfish as well.
Anyone who is frightened, in pain, cannot live a normal life and is desperate for a new organ may probably agree with me.