I recently started building products focused on healthcare affordability in the US. As I was ramping up on a new space, the biggest question that sparked my curiosity was: how did we get here? This question is the inspiration for this weekly series chronicling the decisions, accidents, and breakthroughs that built the US healthcare system.
In 1933, a 27-year-old doctor named Sidney Garfield borrowed money from his father, drove out to the Mojave Desert, and built a 12-bed hospital in the sand.
He had signed a contract to provide medical care for 5,000 construction workers building the Colorado River Aqueduct — the most ambitious water project in California’s history. The nearest hospital was hours away. The work was dangerous and the desert heat was unforgiving.
Garfield’s radical belief was that a doctor’s job was to keep people healthy, not just treat them when they broke down. So, he introduced safety education, hydration protocols, annual checkups. Injury rates among his workers dropped from 27 per 100 in 1934 to 3 per 100 by 1937.
The medicine was working. But the business was not.
Insurance companies paid slowly, or didn’t pay at all. Garfield kept treating workers regardless — you couldn’t turn someone away in the middle of the desert. But the hospital was quietly going broke. He was weeks from shutting the whole thing down when an insurance executive named Harold Hatch came to see him with an idea.
Hatch proposed flipping the payment model entirely. Instead of billing after treatment, the insurance company would prepay Garfield a fixed amount per worker per day in exchange for a guarantee of care. The rate: a nickel a day per worker for work-related injuries.
The revenue stabilized immediately. With predictable income, Garfield could plan ahead, hire properly, and invest heavily in prevention. And prevention was now in his direct financial interest. A healthy worker cost him nothing. A sick one cost him everything. For the first time, a doctor’s incentives were perfectly aligned with his patients’ wellbeing.
Garfield extended the offer directly to the workers: pay an extra nickel a day from your own pocket and I’ll cover everything — work injuries, illness, your whole family. About 95% of workers signed up. The hospital thrived. And Garfield quietly proved something that would take American healthcare decades to fully absorb: keeping people well was better medicine, and better economics, than waiting for them to get sick.
When the aqueduct project ended in 1938, Garfield was preparing to go into private practice when a colleague mentioned his work to a man named Henry Kaiser — the builder behind the Hoover Dam, the Grand Coulee Dam, and soon the Liberty ships that would help supply the Allied war effort. Kaiser’s Grand Coulee workers had almost no access to medical care. He invited Garfield to come north.
When Kaiser visited Garfield’s hospital, the two men spent the whole day together talking. At the end of it Kaiser told him: “If your plan achieves even half of what you claim, it should be available to every person in this country.”
Kaiser was a builder who thought in scale. In Garfield’s prepaid model he saw something that could work far beyond a desert construction site. He was right — but neither of them could have imagined just how far it would go.

Next week: Kaiser takes Garfield’s idea to his WWII shipyards and scales it to 200,000 workers. It is a fascinating story of how a wartime health plan became the largest nonprofit health system in America.
