Health care is an unusual product in that it is difficult, and sometimes impossible, for the customer to say “no.” In certain cases, the customer is passed out, or otherwise incapable of making decisions about her care, and the decisions are made by providers whose mandate is, correctly, to save lives rather than money.
In other cases, there is more time for loved ones to consider costs, but little emotional space to do so — no one wants to think there was something more they could have done to save their parent or child. It is not like buying a television, where you can easily comparison shop and walk out of the store, and even forgo the purchase if it’s too expensive. And imagine what you would pay for a television if the salesmen at Best Buy knew that you couldn’t leave without making a purchase.
Update: Related points on insurance and the lack of health care comparison shopping from Milton Friedman.