Worse prices are non binding, often stated prices have little relationship to billed prices.
More broadly, I think the discussion needs to move away form health "insurance" because what we're really talking about is health care financing.
Consider, A 1% chance of a problem is reason to buy insurance. However, if the bill is always ~2,000$ then some people will pay for it, but it's skippable (2$/mo). If it's 20,000k then more people would pay for it and pay more money (20$/mo). If it's 200,000k then it's less affordable (~200$/month) but even if you only get 1/2 the population that's still more profitable. It's only when prices get to 1% of 2,000,000$ that it's simply unaffordable and most people would skip the ~(2,000$/mo) bill.
PS: This is borne out by single payer systems which tend to have vastly lower costs for the same procedure. Assuming similar economic conditions. http://data.worldbank.org/indicator/SH.XPD.TOTL.ZS
Of course, the ACA doubled down on the problem with the employer mandate.
I have a HSA, and I've had to get stitches twice (two on a cut finger both times): one time it cost $400, the second time $1200 (same city, but different hospital and insurance). Outraged at the second price, I tried to figure out which hospital would be cheapest with my current insurance, and utterly failed.
Just asking a few questions is already a big difference from doing whatever the doctor says.
Let's say you're a healthy 20-something that's been experiencing weakness in your hands. The doctor comes back and says "This could be either arthritis (5% chance), cancer (0.1% chance), or nothing at all (94.9% chance). Test X will rule out cancer and test Y will rule out arthritis, but they both have a false negative rate of 15% and a false positive rate of 15%, and each test will cost $1,000 to perform".
Now what do you do?
I would make the claim that performing either test would be irrational given the probabilities. But people aren't going to screw around with their health.
Your position also presumes that doctors know what the heck they're doing and can provide information to the patient that allows them to make an informed decision. This is meant as no disrespect to the profession at all, but the reality is medicine is a lot of guesswork. It's very normal for a doctor to prescribe a battery of tests, or trial medications, because all they can do is assemble hypotheses and then test them against the individual. I guarantee you, anyone with a chronic condition has heard something along the lines of: "Well, I don't know what that is, but let's try this drug and see if it helps".
This is fundamentally why I don't believe healthcare can work as a free market. A free market presumes rational actors and perfect information, and healthcare is the antithesis of those things.
I'm not a huge believer that health care should be a market but at the moment we at least are supposed to have some sort of market, so I'd like to see market mechanisms applied where it is sensible.
Well, there's this (from http://www.foothealthfacts.org/Content.aspx?id=2827):
"Patients with unrecognized ankle fractures have a high risk of developing infection, arthritis and foot deformities that may make it impossible to walk normally again."
So what's your appetite for that risk?