You're right that there's no single bad actor, and that's exactly the framing of this series. Each issue isolates one mechanism with one savings estimate. The 254% figure is RAND's. What I added is the HCRIS cost-to-charge analysis across 3,193 hospitals showing the variance by ownership type.

The surprise was nonprofit hospitals: median markup of 3.96x actual operating costs, versus 2.39x for for-profit and 1.87x for government hospitals. That's hard to square with the narrative that nonprofits deserve their tax exemptions ($28-37B/year) because they serve charitable purposes.

On the self-funded employer point — you're correct that self-funded plans have more negotiating latitude, and thousands of them already use reference pricing (capping hospital payments at a percentage of Medicare). That's actually the policy fix this analysis proposes. Montana Medicaid implemented it and saved $47.8M. The question is why it isn't the default.