dont we laready have a few forms of govt provided healthcare ?

Medicaid, Medicare, WIC programs, etc.... and of course, the invisable healthcare provider of last resort - the open-to-all-ER of every hospital... all the "free" care in the ER (ever been to an ER on a Sat night? not a very pretty sight....) is ultimately paid by.... wait for it.... the taxpayer! no such thing as a freebie.... therefore, given that we, as a society, are already paying for a form of universal healthcare, what is so bad about formalizing it...?