If you were negotiating this care for yourself, you could almost certainly get it cheaper (as you have a much bigger vested interest in your savings account than the government etc does), and we would not get nearly as many unneeded procedures done. Most of the time it's not even a question, and it should be. They don't say, we think maybe you should have this done and this is why. They say, we're going to do a X. Maybe they tell you why, if you ask them, otherwise it's just assumed that since I'm sick I should do what they say.
I broke my arm a few years ago playing softball. I had an extra 90 degree angle in my arm. People in the bleachers heard it snap. It was 100% broken no question about it. The hospital wouldn't give me any pain killers until they had an x-ray to see if it was broken or not. Now I suspect getting an x-ray is useful for the guy doing the surgery to fix it, and he did several as well, but there was 0 reason for the x-ray in the emergency room. It cost me (and the insurance company) money, it wasted valuable time for the nurses/doctors who could have been onto the next patient sooner, and most important it made me absolutely miserable for another hour waiting on it when all i needed was some pain killers and nice splint until I could have the surgery.
Socialism doesn't solve this problem. It just makes you pay for my x-ray.