Apparently healthcare in the US is something like $10k per person per year? Seems fair to take that from the US median income so we are comparing apples with apples. Looking at your wikipedia link that would put the US down around 11th... After Belgium, Norway, Austria, etc and that is before we start talking about education.
Look - your point that people in USA have more money is mostly true. But when you add in the extras you have to pay for the difference is not as big as you might think. And none of that explains why pregnancy related deaths are so comparatively high.