The only way to not have high medical cost is to have low human life value and low life expectancy, the 3rd world way.
Do you want to have low life expectancy of the 3rd world like Nepal or Bangladesh, Afghan, Somalia, (not trying to insult others, but just to draw an example of living condition and hardship they endure) etc so that you can save on taxes (to pay for public healthcare) or pay the US medical insurance for privatized healthcare? Nope? I guess we have a common consensus then.
Personally I would likely try to end my life with as little pain as possible and decline life support at the end of life instead of dragging out a stage 4 cancer fight, not because of dollar cost but because it is less painful. I don't think it is human nature and I might change my mind when I'm there.