I assume they were not discussing welfare payments for high ranking military officers when they mention "promote the general welfare". And the 16th amendment allows for the government to tax for the purposes of promoting the general welfare.
“The Congress shall have power to lay and collect taxes on incomes, from whatever source derived, without apportionment among the several States, and without regard to any census or enumeration.”
There are numerous other mentions in The Constitution supporting their right to tax you for whatever they deem is for the good of the nation.
And not just to "promote the general welfare" but to "provide" it, as well:
"Congress shall have power to lay and collect taxes, duties, imposts and excises, to pay the debts and provide for the common defense and general welfare of the United States;"
It is safe to say that keeping Americans healthy would be providing for the general welfare of the United States. You may not like it. But that is The Constitution.
As for healthcare being a right? Article 25, section 1 of the Declaration of Human Rights:
“Article 25 Section 1
Everyone has the right to a standard of living adequate for the health and well-being of himself and of his family, including food, clothing, housing and medical care [...]”
Signed by the President of the United States of America and ratified by Congress, healthcare is a right in the USA.
The basis of the Declaration of Human rights was not meant to be an enforceable treaty, but it was to be a recognized document to give legal definitions to generalized ideas like freedom and rights around the world. Things that had, up until then, not really been legally defined have been since that time.
You can and should thank Eleanor Roosevelt for her small part in all of that.
For those of you that screech "free markets" extremism and falsely tout The Constitution, threatening to "Go Galt"? None of this infringes on your rights to pursue “Life, Liberty and Happiness” unless your definition of those things are having a few more bucks so the poor can die of illness. If you think those things than you are an extremist because nothing in The Constitution guarantees you those things as a "right". And, in fact, the legal definitions could not support your extremist misconceptions.
Even Adam Smith, the “father of modern economics”, recognized that a capitalist society based on free markets would cease to function if there were no taxes, wage controls and strong social safety nets to balance the free markets. From his wiki:
You’ll also find that Adam Smith, the original free marketeer that founded the line of thought free market extremists screech about in the USA today was also one of the strong influences on communist theories.
So, if you're against healthcare reform for all of the really stupid reasons? The reasons that are not there in The Constitution and the reasons that don't work in a balanced free market and the reasons that are so extremist they are actually going against The Constitution and the laws of the United States of America:
Please, feel free to "Go Galt" and take all of your communist influence with you.