That pharmaceuticals in the US are going to stop R&D is BS. I bet there are many 'hacker' scientists that would happily keep doing their job as long as someone employees them. So maybe it won't be Wall St. but there is still money in it, job satisfaction and they aren't going to trade in their lab coats for McDonald's uniforms. Look at stem cell research, private companies could still fund it all they wanted, but once the federal government's teat was shut off research died. Public healthcare wouldn't diminish the government's interest in funding research. Sweden still has many notable things in the field of medical research, and all from a country with a GDP roughly that of North Carolina.
You seem to be suggesting that if the US went to the same model as the rest of the world, we would all collectively implode? You need to explain that position a little deeper.
I don't buy it.
In other words: Money doesn't magically disappear just because the way it is distributed changes.
http://www.xconomy.com/tag/Life-Sciences
Not all the cash is redistributed taxes - there is tons of private investment going to develop treatment
Yes, but the success of those systems is dependent upon the (semi) free-market health system in the United States.