How can regulators and policymakers address the growing dominance of "big health" intermediaries in the healthcare industry, which are extracting substantial rents and potentially affecting both healthcare costs and quality? What measures can be taken to ensure a fair and competitive healthcare market while preserving patient care quality?

What potential disruptions and innovations could newcomers like Amazon bring to the healthcare industry, and how can they overcome the complexities and market power of established healthcare players to offer more consumer$-$friendly and cost$-$effective solutions?