Earlier quoted context omitted.
Median disposable income (after healthcare, taxes, housing, etc.) in the US is the highest in the world aside from Norway I believe.
Curious, does the "after healthcare" allow for future, average healthcare claims? I imagine it's easy to have high disposable income today, if not allowing for the cancer treatment you may pay for tomorrow. As said, this is a question. I understand only some people in the USA have full health insurance.
For the average person though there isn't much risk of having to pay tens of thousands of dollars for cancer treatment. The vast majority of Americans have health insurance, and your costs are limited by the out of pocket maximum.