We absolute must face the reality that because of scarcity, we will not all receive "the best medical care possible". There simply is not enough to go around. Jonathan Kay nails it:
Even the wealthiest societies, no matter what the funding model for their health systems, have finite resources available to treat the human body’s potentially infinite medical needs. Someone, somewhere has to make a decision about where those finite assets go.
Such decisions seem horrifying to most of us because life, in most contexts, is too precious to be captured with dollars and cents, or even with the ordinal rankings used to assign transplantable organs. And utilitarianism can, indeed, be taken to monstrous extremes on the fringes of bioethics. But where the day-to-day business of critical-care medicine is concerned, some measure of soulless cost-benefit analysis is an absolute necessity — because every dollar (or organ) used on one patient within a public or private insurance network usually is, in effect, taken from another.
If we don't understand this simple truth, we are doomed to misallocating health resources.
A summary of too many people's view of the Canadian health care system is:
Better that one rich person be denied care so that 50 poor people can stand in line hoping to get it.
... which of course completely ignores both supply effects and the beneficial rationing effects of the price system.