[mijamo]

Well sure, but the fact that it is personal belief doesn't make it less selfish.

As long as it is opt in you won't get much success, because there is no benefit and people are lazy by nature, which is normal.

I don't think paying organs donors should be a thing, so maybe have a priority list for organs where donors get higher? Seems fair: you promised to help society, and in exchange society promise to help you first instead of the selfish non participants.