How do you account for the cost of a delivery? Do we just assume a totally fine birthing experience? What if there's complications? The emergency blood transfusion sure isn't free. It's also not predictable individually.
Ooh I know we'll calculate the cost across the mean population. Of course almost everyone has children or was a child, or knows someone who will and is invested in their well-being. And we can't account for when births happen so we need to keep facilities staffed in downturns, and account for future expensive deliveries where neonatal care is needed.
So really, the best strategy would be some scheme where we charge everyone a little - and the more people we add in the pool the smaller it'll get.
If only there were a name for such a system...
The problem is that the customers cannot see the prices, and thus can't negotiate before hand. This isn't just for emergency care, but for stuff that shouldn't be too hard to get pricing for. There's a nice Vice(?) video about a couple having a baby. They find it impossible to get even an indication of cost before hand.
This patient choice stuff made its way to England, and frankly it's dumb. People don't change their utility suppliers even though they'd save large amounts of cash. They don't change their GP unless they've moved house; they don't have enough information to make an informed choice of hospital if they need to go for surgery. It's a lot of bureaucracy that has very little benefit.