What a year of life costs, and why America overpays
The first hundred dollars a country spends on health buys more life than the next ten thousand ever will.
Put health spending per person on one axis and life expectancy on the other, across all 191 countries with both numbers, and the shape that falls out isn't a straight line. It's a curve that climbs steeply, then bends flat. At the bottom, a little money buys enormous returns: clean water, vaccines, antibiotics, a nurse at the birth. At the top, fortunes buy months. The correlation is real and strong (r = +0.83 against spending on a log scale), but "strong" hides the bend, and the bend is the story. You can see it on the health spending versus life expectancy chart, where every country is one dot.
Where a dollar still works
Look at the cheap end and you'll find countries buying long lives on small budgets. Bangladesh spends under $100 a head and still clears 75 years. Costa Rica spends about $1,163 per person and reaches a life expectancy of 81 — within a year or two of countries that spend ten or twenty times as much. The lesson isn't that money doesn't matter. It's that the first money matters most, and most of the world is still on the steep part of the curve where it pays off.
And then there's America
The United States spends $13,473 per person on health — more than any other country on Earth, the single highest figure in the data. For that, Americans get a life expectancy of about 79 years. That isn't last place. It's mid-pack: dozens of countries spending a fraction as much live as long or longer. 46 of them, in fact, reach at least the American life expectancy for less money, and the cheapest of them, Albania, does it on roughly $591 a person — about 23 times less than the US spends.
Hold the US up against Switzerland, the world's second-biggest spender, and the point sharpens. Switzerland spends about $11,784 per person, nearly as much as America, and its people live to about 84.5 — more than 6 years longer. Same neighbourhood of spending; very different result. Whatever the extra American dollars are buying, on this measure it isn't years.
What this does and doesn't prove
It doesn't prove the US system is the worst, or that spending less would automatically add years. Life expectancy is dragged down by a lot the health system never touches: car crashes, guns, opioids, obesity, the things that kill the young and weigh heavily on an average. A cross-country snapshot can't separate those out, and I'm not going to pretend it can. What it can show, plainly, is the shape: the world is mostly on the steep part of the curve, the US is alone out on the flat, and the country that spends the most does not live the longest. The dollars and the years are both on the page. The chart draws the gap between them. You can decide what to make of it.