[BrenBarn]

It is certainly true that providers charge more in the US. However, it's hard to disentangle this from the insurance issue because of the way that providers and insurers are intertwined in a gordian knot of insanity.

The article mentions one example of this, which is that part of "provider costs" is actually paying for the provider to wrangle with the insurer. But even apart from such direct costs, the care is distorted in various ways in order to comply with the insurer's whims. One you hear about a lot is doctors ordering tests that likely aren't really necessary, simply to avoid having the insurer deny something later because they didn't go through all the required motions.

Another reason that "profit margin" is grossly inadequate as a measure of cost or inefficiency is that it doesn't count the actual "work" done by the companies, even though a lot of it simply doesn't need to be done. There are thousands of people with jobs in insurance companies that simply do not need to exist because most of what the industry does simply doesn't need to be done. The leeching is not just a matter of shareholder returns or executive salaries. All the salaries of everyone working for insurance companies are a form of waste. (Okay, probably not all, since even with a saner system some bookkeeping would need to be done, so if you look at the net difference it's not a total waste. But it's more than just shareholders and executives.)