This should shock nobody. Walmart's employee health care plan is better than Obamacare! Not just marginally better, either. Astronomically better.

Low premiums are not the only distinguishing feature of the Walmart plan. The retailer's employees can use eight of the country's most prestigious medical facilities, including the Mayo Clinic, Pennsylvania's Geisinger Medical Center and the Cleveland Clinic.

At these institutions, which Walmart calls "Centers of Excellence," Walmart employees and their dependents can get free heart or spinal surgery. They can also get free knee and hip replacements at four hospitals nationwide.

Many top-rated Walmart hospitals - such as the Mayo and Cleveland clinics - are left out of most Obamacare exchange plans.

But the real difference between Obamacare and Walmart can be seen in the levels of day-to-day access to doctors and hospitals.