About a minor but major healthcare reform

With relation to the health issue, currently the non-insured that need to negotiate on their own always end up paying many times more for their medicines and healthcare services than those whose price negotiations are handled by knowledgeable insurance companies. A one line law, “thou shall not charge the weak and lonely any higher prices than you would charge the strong defended by a strong insurance company”, could eliminate most of the current injustices. Would you agree with such law?