There is another side of this. Most of us probably know at least one person who qualifies as a medical over-user.
A neighbor had very good medicare and gap insurance. Let me tell you, she used that insurance like it was a job to do so. Although she was generally healthy (had easily managed type 2 diabetes but no other health problems), she was a lonely, very elderly woman whose friends had died, moved, or evaporated from her life due to conflicts.
Her resultingly empty social calendar started to fill with various doctor appointments. She considered her doctors to be "friends," and while it's important to have trusting relationships with medial personnel, she became truly wasteful of their time and our Medicare tax doctors. The docs didn't turn her away because, after all, they were getting paid to see an unchallenging patient that they shot the breeze with for ten minutes. (I accompanied her on a couple of visits which is how I know what went down.)
She hit doctors at least twice a week for ten years, I kid you not. Various abuses of the system are legion, whether it's over billing, overuse, or outright fraud.