[..]
Other opt-out systems around the world have shown that it helps a great many people just by making more organs available for transplant that would otherwise just go into the ground or the fire.
That's not true for the UK (and many other places) for these reasons:
1) In the vast majority of deaths most organs can't be harvested anyway. There are a lot of circumstances that rule it out and even in the right circumstances there's a very small window of opportunity. Unless a person dies on life support in hospital and is otherwise in good health you're probably not going to be able to use their corpse for spares.
2) Most people who could donate had already given their consent to donate.
So in exchange for removing the need for consent there might be a small increase in transplants. Maybe. The claim that there will be a very large increase is simply false.
