> [I]n the UK they won't pay for dialysis after a certain age

This is completely WRONG, there are NO age-related limits for treatment like this in the UK. Dialysis is a life-saving procedure for those with kidney failure, and is available to everyone in the UK who requires it regardless of age. The same goes for heart surgery, bypass operations, stents etc. which are also sometimes claimed to be age restricted.

The fact that people actually believe that a cruel system like this (one that would cause people to die by withholding treatment just because of their age) might really exist probably says much more about the way US health care works and the perceptions surrounding it.