A major purpose of science fiction is to examine the present through the exaggerated lens of a possible future. Can you really think of no present-day examples of high-capital-expense, low-marginal-cost, highly-effective medical care being priced away from a large chunk of the population?

If you can't, I'll do you one better - worldwide, infant diarrhoea is the second leading cause of death in children under five years old. It can be treated with pennies worth of clean water, sugar, and salt. It can be prevented just by providing access to clean water. We absolutely have the resources to heal every child on the planet of this disease, if we cared.