Answer:
The best choice for the United States would be a system in which everyone is covered by insurance, where a public robust option exists, but where there are also private options that can become spcialized in less essential care like comestic plastic surgery, or cosmetic dental care.
For this system to work better and to reduce the high spending in healthcare as percentage of GDP, many managerial jobs in the insurance industry should be cut, and only those that are essential should be kept.
The private options should be kept under a more rigid oversight so that they do not overcharge their users for services or prescription drugs.
Finally, the public option should be robust, insurance every person who cannot afford private insurance, and the government should make sure that it is well-funded.