i didn't know hospitals sold beds, i thought they were primarily a service provider.
Well...an oversupply of "services" would mean we have an oversupply of medical workers, tech's, nurses, doctors.
Actually technically we do have an oversupply of medical workers. Its in part why we pay more for medical services in this country. The flip side is that we have a lot of choice in where we want to have medical services, and don't have to wait for weeks or months for an MRI, or to be seen by a specialist.
In regards to your graph.
1. Your graph only calculates physicians not other medical workers. And in this country.. we have multiple facilities in which physicians work.. which gives americans more choice and timeliness of care, but is less efficient since 8 physicians in one network is more efficient and need less support staff then those 8 physician spread out over 4 facilities. (of course lowering reimbursement is currently causing consolidation)
2. We don't know the details of your graph but it would not surprise me if that graph was on general practitioners.. which I could believe we have a supply problem with. but we are technically oversupplied with specialists (which again raises the cost of healthcare in the US, its why other countries control the number of specialists they have)
3. We don't know the details of your graph in regards to what constitutes demand/supply.
Does it calculate that care COULD be provided by alternate providers such as Physician assistants, nurse practitioners and therapists (in some countries and even in the US military, physical therapists are often the first to see many orthopedic injuries rather than have a physician see them and turn around an order physical therapy)
How does the graph calculate demand? Is that demand that a person needs to see physician in 1 day.. or within 1 week, or for a specialist 1 month? Etc.
The technical fact is that our healthcare system is less efficient than other countries medical systems and that means that technically we have an overabundance of medical services. It also means that we don't wait as long, have more choices in who we want to see, and more choices in the types of procedures we have available to us.