?As I said, every tiny cut doesn't require medical attention. People with insurance are far more likely to seek it because "I paid for my insurance." People who don't have insurance are far more likely to say "It's not too bad. Where are the band-aids?"
I don't think this is a fair assessment of the real situation at all.
I think people without insurance ARE less prone to seeking medical attention in both situations when they do need it and when they don't.
However, I also think very few people go because they think "I paid for insurance". Most people I know, myself included, go because they feel they need to go. The only reason they might not if they don't have insurance is fear of the cost, not because they feel like they don't need to go.
Personally, I would never go to seek medical attention just because I have insurance. I would treat the situation the same if I didn't have insurance, with the caveat that I might fear the cost a lot more. So the only time I'd want to go and wouldn't because of insurance was if I felt I really did need to go, meaning I would be suffering for not having insurance.
To be clear: I do NOT believe MOST people go to the doctor or other medical places for more unnecessary reasons if they have insurance.
As for your "hangover headache" example, those people who get hangovers should know better. Most of them have probably gone through it before and will again - take some headache pills and rest.
By the way, simple tip to avoid a hangover: Drink more WATER, either in between alcoholic drinks or directly after but before you go to bed. Make sure to drink at least as much water as you ingested in alcoholic drinks volume wise. Most hangover headaches are caused by simple dehydration brought on by the combination of alcohol's diuretic effects on the body and people's unwillingness to drink enough water because they feel as though they've already drank enough and have to go to the bathroom too much. That's just an FYI since it was brought up.
Also, people paying $25 already stops most unnecessary visits. Increasing that to $125 would result in a lot less people going for LEGITIMATE reasons, but the numbers of those who are unnecessary and go at $25 but not at $125 are probably quite small.