That's a problem with implementation of the system, not the idea that everyone has a right to treatment. Most other well-off countries get similar outcomes to the US with much smaller benefit levels. In other words, treatment outcomes are just as good, for example in Scandinavian countries and Japan, as they are here in the US, with only a fraction of the cost. See Kotlikoff's 'Healthcare fix' for details.
The main culprit is Medicare, which is just too generous with benefits. A universal policy that covers everyone (and removes Medicare and Medicaid) through goverment-subsidized vouchers is a solution. Kotlikoff's book is like 100 small pages and describes this in detail.