Why health care belongs in one pool — and on the same list as the power grid
Strip away the forms and the jargon and health insurance is one thing: a group of people who agree to cover each other’s bad luck. You pay in while you’re well. Someone else draws out while they’re sick. Next year it reverses. That’s the entire machine. Every fight about health care reform is really a fight about two questions — how big is the group, and how much of the money gets burned deciding who pays whom.
Start with the part everyone already understands. Four friends split a dinner check, one orders the lobster, and your share jumps. Four hundred people split it and the lobster disappears into the rounding. That steadying of the bill is the first thing a pool does, and the smallest thing it does. The real power of a big pool is the price it can settle on.
Here’s the mechanism underneath all of it. Every premium covers four things: the real cost of care, a cushion against a bad year, the overhead of running the plan, and — in a commercial plan — profit for the company on top. As the pool grows, the first two settle. The cushion shrinks, because a big enough group has no bad years to speak of, and the cost of care averages out to a steady, predictable number. The overhead falls when one plan replaces a hundred. What remains is a floor: the true cost of care plus thin administration. A public pool stops there. There is no fifth layer skimmed off for shareholders. Federal insurance buys so much per dollar for that one reason — the same care, the profit removed, and a pool large enough to hold the price against its floor.
That’s what the postal example is really showing. The Postal Service’s health pool runs to something like 700,000 workers and their families, and the rank and file — clerks, carriers, mechanics — carry coverage that looks like the executive packages other companies hand out only at the top. Federal insurance, whatever the specific plan, is built on that floor-seeking structure. Some plans cost more, some less, percentage-wise, and all of them sit on a foundation with no profit motive pulling the price up. Now hold 700,000 against the number that matters. The country is 340 million — five hundred times larger. Make the pool the size of the nation and the price settles as low as the arithmetic allows.
The savings compound, because one pool also means one rulebook. Picture a highway with a separate toll booth every mile, each run by a different company with its own forms and its own appeals process. Traffic crawls, every booth needs collectors, every trucker needs a clerk who has memorized all the rulebooks. That is American medical billing — hundreds of insurers, each with its own codes and prior-authorization rules, and a hospital forced to staff an army just to get paid. The bill for that complexity is staggering. The U.S. spends roughly $2,497 a person on health care administration, against $551 a person in Canada — close to five times the rate. Administrative costs make up about a third of total U.S. health care expenditures. Cutting that overhead to Canadian levels would have saved more than $600 billion in a single year. One pool means one rulebook, and the paperwork army stands down.
There’s a second wasteful game that one pool ends. When pools are small and joining is optional, insurers spend real money chasing the healthy and screening out the sick — marketing, underwriting, denials, the whole apparatus of avoiding cost. Every dollar of it competes for the profitable customer, and none of it touches anyone’s health. Put everyone in one pool and that game is over. No one is left to select against, and no one is left outside to shift costs onto. The money that used to fight for market share can fund the health education and prevention that keep a population well — the cheapest care there is. An uninsured person’s emergency-room visit lands on everyone else’s premiums anyway. We already pay for the whole country. We just pay through the most expensive door.
And we are already running this experiment three times over. The country operates three enormous public pools right now — Medicare for the old, Medicaid for the poor, the VA for veterans — each with its own administration, its own rules, its own buildings. Around twelve million Americans qualify for both Medicare and Medicaid and spend their lives bounced between two bureaucracies that were never built to talk to each other. Fold those three into one before touching anything else and the duplication you delete is a fortune on its own.
You don’t even have to chase the floor to win. Leave every price where it sits today — full commercial rates, the numbers private insurers pay right now — and the national pool still comes out ahead on structure alone: one rulebook instead of hundreds, everyone in instead of screened and sorted, no profit skimmed off the public plan. The floor is upside on top of that, the place the price drifts once the pool is the whole country. The U.S. currently spends twice as much per person on health as its peer nations, and gets worse outcomes for it.
Which points at the real conclusion. Some things a country doesn’t run as a market, because the market handles them badly. You can’t shop for a better deal during a heart attack any more than you can comparison-shop the power grid in a blackout. Energy, water, the roads, the wires that carry a phone call — we treat these as utilities, shared infrastructure everyone pays into and everyone draws on, because universal access is the whole point and competition mostly duplicates the plumbing. Health care has every one of those traits: demand you can’t postpone, a need every single person carries, and a market whose main product is paperwork and the art of avoiding the sick. It belongs on the list. Energy, communication, transportation — and health. Run it as the utility it already is, in one pool, at the floor, and the country stops paying a premium to pretend it’s something else.
If you read this and thought, man that sounds great but I just don’t really get how the whole risk pool thing works…. the next section is for you.
The Math Underneath
How spreading risk flattens the cost — the arithmetic behind the pool
The main piece claimed a big enough pool has no bad years and settles its cost to a floor. That isn’t optimism. It’s arithmetic, and here is the arithmetic.
Start with one fact about people and one fact about crowds. Any single person’s health cost in a given year is wildly unpredictable — you might spend nothing, you might spend half a million. The average cost across a large crowd is the opposite: steady, and steadier the bigger the crowd gets. The rule that governs how fast it steadies is short. The year-to-year swing in the average shrinks with the square root of the number of people. Quadruple the pool and you halve the swing. Multiply the pool a hundredfold and the swing drops to a tenth.
Watch it work on a catastrophe first, since catastrophes are what wreck small pools. Say one member runs up a $1.5 million year — a transplant, a long stay in intensive care, a baby born months early. Spread that single bill across the pool:
- 100 people: $15,000 apiece. The pool is gutted.
- 10,000 people: $150 apiece. A bad bump.
- 1,000,000 people: $1.50 apiece. Background noise.
- 340,000,000 people: under half a cent apiece. Gone.
The bill never changed. The number of shoulders did. A catastrophe that would sink a small group is invisible to a national one, because the same dollars land on five hundred million more people.
Now the deeper version of the same effect. Take an average cost of $6,000 a person for the year, carrying the enormous spread real health spending has — most people near zero, a handful in the hundreds of thousands. (Use an individual swing of $24,000 for the illustration; real spending is even more lopsided, which only sharpens the result.) Run the square-root rule on the pool’s average:
- 100 people: the average lands within about $2,400 of $6,000 — it could come in anywhere from $3,600 to $8,400. To survive that, you hold a fat reserve.
- 10,000 people: within about $240. A few percent.
- 1,000,000 people: within about $24.
- 340,000,000 people: within about a dollar.
At national scale the average cost is pinned to its true value within the price of a coffee. There is no plausible bad year left to insure against.
That is the whole trick. The care itself costs what it costs — a heart surgery’s price doesn’t move because more people share the plan. What a pool destroys is the uncertainty around the total. A small plan has to charge the true cost of care plus a thick cushion, because it genuinely might draw a brutal year. A national plan can charge the true cost plus a sliver, because it won’t. The cushion is the price of not knowing, and a big enough pool simply knows.
Stack that on the rest of the floor — one administration instead of hundreds, no profit skimmed for shareholders — and the math points one direction. The true cost of care, thin overhead, almost no risk margin. The price stops falling because there is nothing left under it. That floor is reachable only by the largest pool there is, which is all of us.
