Inherent in universal health care plans are price controls. By bundling patients together under major health care insurance providers or the Federal government, patients gain the ability to collectively bargain with doctors, biotechnology and pharmaceutical companies, and nurses, lowering the cost that these people and companies can charge for their services. By this method, more people are able to get more health care at a lower cost, with the sacrifice being that we can no longer use market mechanisms to influence our health care system.
Conventional market economics will suggest that this is an outright bad idea, since market mechanisms are more responsive and elastic than asymmetrical bargaining. However, this can be dismissed as a serious rebuttal since health care markets are already deeply distorted by complicated insurance systems and the AMA cartel controlling doctor credentials.
But, there is an important practical and philosophical problem which this poses.