One might look at Switzerland. A big difference between there and the U.S. seems to be that the people can petition for a vote on adding or removing any law or amendment they don't like, at any of their three levels of government. Contrast that to the U.S., where this ability doesn't exist in most places, including the federal government which was designed to be responsive to the states and not the people.
The Swiss also have a tradition of local power where possible, to the point that most of their social programs such as health care are handled by cantons (states) that average a third of a million people each. While in the U.S. we have literally a thousand times that many people arguing over health care at the federal level.
Here's a bunch of info on the Swiss political system: https://wolf-linder.ch/wp-content/uploads/2010/11/Swiss-poli...
By the way, the US health system crisis is caused by regulatory capture. There is no way to regulate the regulators to prevent this. At least, not in a failed democracy such as the US.
Probably the only way to regulate the regulators in a society as complex as the US and most other countries (contra Scandinavia) is with strict constitutional principles. That's the only way I know. Once you put "people" in charge, corruption and other dysfunctions eventually reign.