Why do you believe the solution needs to come from tax collected revenue? If you had a way to make people live healthier, don't you think people would pay you for it?
Sure, the wealthy would have means to pay for cures, life-extension, organ-regeneration while the poor would not. Imagine the dystopia that creates.
Let's say there was a 100% effective treatment for cancer/MLS but cost $20,000 per month. We'd all be "willing to pay" for that for a loved one but "willing" isn't "able." That's the problem with US-style for-profit healthcare. Economics breaks down because there's no ceiling to what the "consumer" is willing to pay, only a profit-based decision by companies of how many people it wants to divide into people deserving of health and those not.
Seriously, as a society, if we don't grapple with economic ethics of "miracle cures", corporate greed plus technological advances will lead to endless class wars over who's grandma/child gets to live or who's withers and dies unnecessarily.
Why do you believe the solution needs to come from tax collected revenue? If you had a way to make people live healthier, don't you think people would pay you for it?