Is the U.S. a single-payer system?

Most people stereotype European economies as a single payer system whereas the U.S. uses a system of private insurance that is largely unregulated.  This characterization is largely false.  The U.S. has extensive regulation.  Further, the U.S. federal government pays for the largest share of health care.  According to a CHCF report, in 2010, the federal…