So you're saying that the principle and value of healthcare for all never existed when this country was founded? When you said it never existed I assume you mean it never existed in the original Republic.
Your argument could be turned around on you and state that the founding of this country was an arbitrary creation of values and principles.
Politics is about choices, not absolutes, of course there is arbitrariness in the Constitution and bill of rights. What is not included in the foundation is a right to any economic resources or commodities, there is a delineation between positive and negative rights. Rights to economic commodities are full of flaws and contradictions. Government funded healthcare was never intended because as Franklin said, as soon as people can vote themselves money, that will signal the end of the republic.
What is the definition and purpose of healthcare? What exactly is good health if that is the goal?
Canadians hoot about an insignificant stat on longevity (even though they count infant mortality differently), but let's say longevity is the national goal of the healthcare system. Then the natural and logical consequence of that would be loss of personal freedom so that the goal of longevity can be achieved. For starters:
1) you must outlaw smoking
2) there must be punative measures for obesity and diets must be controlled by government
3) drinking alcohol must be enforced to moderate amounts
we could go on with a very large list, but obviously national healthcare and freedom are not compatible and not just for the reason that the government takes your money and forces you to share risk with fat lazy smokers.
Gov't healthcare will be at odds with individual rights, you can trash the foundation of the USA or you can trash socialism, but you can't have both.