Do you believe subsidized HSAs (both sides of the aisle seem okay with refundable tax credits so maybe a voucher system can work, National Review had a couple of articles endorsing such a concept) could work (something like Singapore’s System)?
Expansion and modification of HSA seems to meet more of the requirements for efficiency than anything else.
Professor mode: to reach efficiency, the last dollar spent should cost the recipient/decision maker exactly one dollar. If it costs him less, he will consume more than it is worth to him, and if it is more, he won’t consume what he would willingly have paid for. [this is a general economic principle that applies to anything that one pays less than or more than the full cost]
In practice, we’re not going to be able to design a system that does this for everyone, given differing medical histories and income–but we can certainly get a lot closer than we are now.
An experiment was run decades ago with a $1 copay on medicaid (and exempting those for whom it would actually be a hardship, iirc[If I were designing it, I’d give them an extra few bucks a month]). Even that
single dollar was enough to significantly reduce usage. That wasn’t because people avoided needed care, but because they didn’t consume as frivolously. With no financial cost, and no job to miss, care was being wasted on routine sniffles and bruises that the middle class wouldn’t skip work or otherwise spend an hour to get. [a darker or more cynical view was that it was a form of entertainment for the idle; I’ve seen a similar phenomenon practicing law.] {yes, I am a lawyer that then got a Ph.D. and spent time as a professor before reluctantly practicing law again to pay tuition . . .}
The HSA expansion that you suggest would want to be designed such that as often as possible, the last service consumed (or not) was one for which the person could keep the full price in the HSA if not spent. This might mean a 10% or 50% copay (from the HSA) for the first couple to several thousand dollars, then the “donut” with 100% from HSA, and then a small copay or stop loss.
As far as out of plan, the real problem is the impossibility of “price discovery”, and a system in which list price can routinely be 20 times the normal transactional price, but “gotcha!” if they catch you unconscious out of plan . . .
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