Stop getting sick and having to use the healthcare system. So no, not really, unless we change our living habits as a civilization, but then we get old anyway.
Even though I seem weirdly unable to get sick, and I've been to a doctor once in 15 years (just to get a note! required by other insurance), I still have to pay unfunny premiums. So being super healthy still doesn't help.
AND YET if everyone in aggregate used less healthcare, I bet it would do more to move the needle than anything a politican plans. Americans are deeply, deeply unhealthy and I wish I could convince them all to eat better. To me it is just wild that so many people complain about non-insurance healthcare costs but do not want to invest in better food/behaviors for themselves.
I'm a lot less salty because the money I pay is being used to treat everyone who gets sick, including poorer and older relatives and neighbours, and nobody looses their house and life due to healthcare costs.
Even if you pay a lot (because you can, with high income) there is a clear benefit for the people around you, not just cooperations. Basically, everyone around you is safe, and that's a good feeling.