re: Why does “Medicare for all” require the illegality of offering plans that cover same stuff

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A plan of such a gigantic scope will only work if the risk pool is diverse enough. Basically you have to have enough healthy, low cost people paying in to offset the cost of those who require significant medical expenses. Allowing a private option would possibly lead to healthier people seeking alternatives based on price or coverage, thus throwing a financial wrench in the whole system

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