I don't see it as a right so much as a moral obligation.
Rights in and of themselves are what can be won through dominance. If someone can take it by force, they have won their right to it so long as they can defend it. Of course, few people want to live in that sort of society (I certainly don't as I would likely be much more poor, insecure, hungry, etc in that situation), but in terms of what is natural, that is how it works and consequently why some animals are predators.
Luckily our morality is often quite different from the law of the jungle, as, we as a human race have realized that there are superior ways of organizing society which allow us to gain more wealth, security, freedom or autonomy, etc and allow us to work on interests that do not have immediate survival implications such as art, science, leisure, etc. As we get better and better at finding ways to remove ourselves from a survival situation, we march towards greater pleasure, happiness, fulfillment, and other things along maslow's hierarchy of needs. This is why I see it as a moral obligation, its the direction more and more successful societies inevitably move towards.
However, this moral obligation needs to be balanced against available resources. At this time, I do not believe we have the necessary resources to be going after universal health case, so while it is a good and moral cause, its not realistic at this time. So on balance, I am not in favor of this legislation right now as we have more immediate priorities as a society.