There is a lot of consolidation going on in health care. The result is the rise of oligarchies in delivery of healthcare, devices and pharmaceuticals. And they have pricing power.
So where does that leave the worker and their employers? While they would like to get the most bang for their buck (patient outcomes and quality of care), they have little negotiating power. And labor unions have that skill.
Seems to me the unions and the employers are on the same side of the table on this one. Perhaps it would be to their advantage and work together to try to get the highest value for their health care instead of the highest price.