There is no supply-demand pricing of medical services. That's why govt regulation is needed. 

People buy the most expensive they can afford. You might say it's similar to monopoly pricing but that's over-reaching. 

Try some other economic term if you must but supply-demand is simply wrong. 

Republicans don't get it. That's why their economic test of their ideology on the personal income tax in Kanses has failed miserably. Their ideology doesn't conform to science.