I agree with the first commenter in the article. I'm sure there are subtleties to organ donor laws that I'm not aware, but I personally like the idea of a hypocrisy test.

This method guarantees that only those supporting a system benefit from it (those who offer to donate organs are only those that may receive it as well). If you don't want to be in a system, then you shouldn't expect to benefit from it either.

I could contrast this system with Social Security, but the latter has too many other political and financial issues that it'd be a stretch.