Final answer:
Health insurance based on market justice would be private, employer-based health insurance, as this is the model influenced by market forces without government intervention.
Step-by-step explanation:
Health insurance based on market justice refers to the idea that healthcare should be governed by the forces of a free market economy, where access, quality, and cost are influenced by supply and demand rather than through government intervention. In this context, the type of health insurance that is based on market justice would be private, employer-based health insurance. The other options, such as publicly financed Medicaid and Medicare, represent government interventions designed to provide healthcare access to individuals with low income or those over the age of 65, respectively, when the market fails to do so. Therefore, having no insurance could also be a consequence of market justice, but it is not a 'type' of health insurance, so it is not the best answer to the question.