Why isn't anyone actually looking to cut healthcare costs?

In the single payer system where I live (Canada), medical offices only have to report claims to two different agencies: the provincial health insurance commission for the great majority of patients, and to the Workers’ Compensation Board, a different provincial agency, for treatment for work-related injuries. In practice, WCB is not a large portion of payments for medical care in the province. There is therefore only one set of codes needed, not over 100.

Here, the [del]consumer[/del] patient does not have any involvement in payment, since there are no co-pays or deductibles. The two clients (insurance commission and WCB) can and do conduct audits.

The provincial governments have worked out a system for uniform drug costs across the country, for drugs used in the hospitals, by using their combined purchasing power, just like WalMart.

Since coverage of medical matters is uniform and universal within a province, there is no need for that function in our system. [del]Customers[/del] Patients never have to ask those questions, since payment is made by the medical commission directly to the doctor or the hospital.

The provincial insurance commission is the one that sets the terms, so there is no need for this function in our system.

Every system has administrative overhead. But the amount of administrative overhead multiplies the more complex your system. Administrative overhead in a single-payer system is much lower than a multi-payer, private insurance system.

Agreed, any system needs an effective audit system. However, the more complicated your payment system, and the more payors there are, the more complex and expensive the audit function becomes. Here, the medical insurance commission performs regular audits within the medical system, and has the statutory power to claw back over-payments. Because there is only one payer and one payment structure, audits will be much simpler and less expensive than what you are describing.