They get the care eventually, whether they have the money to pay or not. They’ll have a heart attack or whatever and go to the ER and get some incredible bill they can’t pay.
If we can get everyone to visit doctors throughout life and take care of themselves along the way it should, in theory, reduce the cost down the road of a more expensive procedure. Of course they still may have a heart attack that needs to be paid for, but I’d rather cover $250 a year (my estimate, no info available) for a doctor visit and maybe prescriptions for 50 years ($12500) than an ER visit, hospital stay, etc, plus whatever else they may have needed treatment for over the years. Avg heart attack cost for uninsured person is $53,000+ (2011).
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From a public health perspective I think we benefit if people are being treated for illnesses rather than have them coughing on all the produce at the grocery store. It’s not that I care so much about them, but I care about me and my family.