Health care is got a nasty price-sensitivity curve. Who wouldn't pay a lot of money to live a little longer?
The solution I would like to see is: 1. Just lower the eligibility age for Medicare by 2-5 years every year. All the machinery is in place and the gradual change gives the system time to adjust. 2. Put 10-20% of the health care budget into making it cheaper to treat and prevent diseases. Allocate the money using the existing grant process. Require that all the results be public domain. 3. Treat lifestyle issues (weight / smoking) when people are young. Go after them aggressively as diseases while people are still in public schools.
The only encouraging thing I have to say is that Social Security got progressively improved once it was enacted. Maybe we will get the same thing over time.