China's Medical Insurance Disproportionately Benefits Wealthy, Study Shows

China's medical insurance system, despite covering nearly everyone, has quietly engineered a transfer of resources from the poor to the rich. A new study published in The Lancet Regional Health - Western Pacific has quantified what many suspected: the country's poorest households are bearing the weight of illness while the wealthy reap the benefits of coverage.

The numbers are stark. In 2023, the poorest fifth of Chinese households—roughly 260 million people—carried 37% of the nation's total disease burden. They were sick more often, suffered more chronic conditions, faced more hospitalizations. Yet when insurance payouts were distributed that same year, this same group received just 6.8% of all medical insurance benefits. The gap is not a rounding error. It is the shape of a system working as designed, just not in the way its architects claimed.

The mechanism is deceptively simple. China's medical insurance relies on flat-rate premiums—everyone pays the same amount regardless of income. A factory worker earning 30,000 yuan a year pays the same premium as an executive earning 300,000. On its surface, this looks fair. In practice, it is regressive. The premium consumes a far larger share of a poor household's budget, making insurance feel less like protection and more like a tax. Meanwhile, the wealthy pay the same absolute amount but barely notice it.

Fragmentation compounds the problem. China's medical insurance system is not one system but many, split between urban and rural areas, between different provinces, between different employment categories. A migrant worker moving from one city to another may find their coverage does not follow them. A rural farmer's insurance may not cover urban hospital procedures. These gaps are not random. They systematically disadvantage people with less money and less power to navigate bureaucracy—the very people who need insurance most.

The result is a perverse inversion. Wealthier households, who face fewer health crises and have more resources to pay out-of-pocket when they do, receive a disproportionate share of insurance payouts. Poorer households, who face more illness and have fewer resources, receive less. The insurance system, rather than redistributing risk from the sick to the healthy or from the poor to the rich, does the opposite. It redistributes from those who need it most to those who need it least.

This is not a new observation. Health economists have long understood that flat-premium systems are regressive. What the Lancet study does is attach numbers to the intuition, making the inequity impossible to ignore. The poorest fifth of China's population is not receiving inadequate care because they are unhealthy. They are receiving inadequate insurance payouts because the system was never designed to help them.

Policymakers are now facing calls to restructure contributions around income rather than flat rates. An income-based system would mean the wealthy pay more, the poor pay less, and insurance actually functions as insurance—pooling risk in a way that protects the vulnerable. Whether China's government will move in that direction remains unclear. But the study has made one thing certain: the current system, for all its claims of universal coverage, is working exactly as it is designed to work. And that design favors those who need help least.