This system is not only grossly unfair, it's the chief reason Americans pay more than twice the OECD average per capita for healthcare than people in other developed countries. Notwithstanding a wide variety of payment systems, countries with universal health insurance -- that is, every other wealthy country in the world -- almost universally empower government to impose uniform pricing. In Japan, for example, where most people get health insurance through private, nonprofit plans provided by their employers (generally with a 30% patient co-pay), the government publishes a uniform price schedule. T.R. Reid, in The Healing of America, describes it:
[the medical price schedule is] published in a thick book--about the size of the Tokyo telephone directory--that anybody can buy. This hefty volume, the Shinryo Tensu Hyakumihyo ("Quick Reference Guide to Medical Treatment Points"), sets forth exactly what a doctor, therapist or hospital will be paid for any treatment or medication. There are tens of thousands of different treatments in the book: "throat swab,", "application of plaster cast, ankle," "sutures, outer arm," "X-ray, simple, neck region, rear," etc., etc. For almost all of these, the price is extremely low...(p. 91).