As one who worked in health care for 20+ years (at a world famous hospital),I have a couple.
1)Lawyers
2)Patients who demand to see a neurosurgeon every time they're hit on the head with a wiffle ball.
3)The fact that average 15 year old (and the average 50 year old) is at least 30 pounds overweight.
One of the biggest problems is our evolving concept of "insurance".
IIRC, insurance was originally conceived as a contingency for low-probability, high-liability items. Now, we use insurance to cover things we KNOW that we're going to use, like dental checkups and annual physicals.
I look at it like student loans.
When the goobermint and everybody else began loaning money for education, our institutions of higher learning realized that there was a huge amount of funds available. That's when colleges began building extravagant facilities and sports complexes and charged insane tuition increases (14% one year at Michigan State University) to pay for them.
Hypochrondriac Lawyers with fat kids?