Rich countries pour heart-stopping amounts of money into health care. Advanced economies typically spend about 10% of gdp on keeping their citizens in good nick, a share that is rising as populations age. America’s labyrinthine health-industrial complex consumes 17% of gdp, equivalent to $3.6trn a year. The American system’s heft and inertia, perpetuated by the drugmakers, pharmacies, insurers, hospitals and others that benefit from it,…