He has had a year and a half of treatments trying to save his life.
If the healthcare plan he has pushed passes, other people will not be able to get similar care. They will be given pain treatments instead.
This is not my opinion; Health Czar Dr. Ezekial Emanuel says that care will be provided based on "quality-adjusted life years." That means that if treatment costs more than $50,000 per anticipated year of quality life, the treatment will be denied.
It also means that if treatment will not significantly improve either length or quality of life, the treatment will be denied - for instance, if the procedure will just reduce pain (say, back surgery or knee/hip replacement), they'll just give pain treatments instead.
Of course, the current Democratic healthcare plan exempts the Congress and Senate members from itself; it only applies to "regular people"...