Healthcare could and should be a right but many things would need to be drastically changed before it could ever happen ( at least in the United States). More importantly preventive healthcare is needed. An adult on medicaid or medicare does not get dental coverage resulting in decay and loss of teeth which in turn leads to inability to eat more nutritious foods which leads to poorer health more doctors office visits and higher costs to the system. The way the government has looked at it is that it is cheaper to treat a terminally ill person even though the treatments are very expensive bc the person won't live long compared to treating a person preventively bc that allows a person to be healthier and so they live a longer life.
The biggest thing driving up the cost of healthcare in America is the greed of insurance companies and pharmaceutical companies. If doctors would go back to finding the problem and treating it rather than throwing medicine at the symptoms then costs would go down. If you pay a roofer to fix a leak on your roof and it still leaks you can refuse to pay because he didn't do what he was hired for but if you go to a doctor and he doesn't fix your problem you still are obligated to pay him. That is why they have started labeling symptoms as diseases so that they can say they diagnosed you with this illness and there is no real cure, just treatments and adjustments to your diet ( acid reflux, irrital bowel syndrome, restless leg syndrome, chronic fatigue syndrome, just to name a few). Each of these are symptoms of a deeper issue but they have been classified as diseases and each require the patient to maintain a lifetime regimen of prescription medicine. Fybromyalgia is another one. And when the doctors say you will have to take these meds the rest of your life and you run out you have to go back in for an office visit just for them to write another prescription. Why can't they just call it in rather than you having to pay a useless visit when it is a lifelong treatment?
Of course greed overrides the desire to help people live a healthier, happier more productive life.