>>9198390>>9198546Working adults often get healthcare through their workplace. There is also Medicaid which is available to everybody if they don't make enough money and private plans for those who can afford it. The tradeoff for no taxes going toward federal free healthcare is so you have money that can go toward a plan you choose.
The culprit is stagnating wages and inflation. But it's not up to the feds to be obligated to provide healthcare for everyone, that's not its role. Anyone with a problem should be taking it up with their state. But besides that, by law, you cannot be denied care in an emergency.
There are sad cases where you get swamped with bills you can't afford, but often the "they charged me 600 for an ambulance" stories are because they're using emergency services like ambulances and emergency rooms for non-emergencies.