If every American had insurance, however, preventive health care would replace the emergency room visits. That's key to Obama's health plan: prevention. With his plan, a significant portion of health coverage will be dedicated to prevention. Having a right to health care and a focus on prevention of illnesses (the top three killers in the U.S can be largely prevented) will decrease the entire country's economic burden, as well as create healthier Americans. Healthier Americans means more productive Americans. More productive Americans mean a stronger economy.
Going back to the Preamble to the Constitution, "We, the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defence, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America," I would say that the government has an affirmative obligation, under the guise of promoting the general Welfare, of ensuring that all of its citizens receive health care.
I think the end result is the same -- the government of our country has not lived up to its own obligations and responsibilities for the general Welfare of the populace by maintaining our current, horrible health care system. But to me it's important to have this debate in the context of our constitutional strictures. I agree whole-heartedly with your second paragraph.