From the NYT:
But not only is there a precedent for this, there is also clear support for it in the Constitution. For decades, Americans have been subject to a mandate to buy a health insurance plan — Medicare.
Except that this health insurance is for other people, and the 65 y/o version of yourself. So it is the hallmark of insanity to buy this necessary product for other people but not for yourself. Would you buy an iPad for every senior citizen but not for yourself?