No, they shouldn't pay back the "benefits", because they already paid for the fuels. No market failures there. There is a very obvious market failure with the d

No, they shouldn't pay back the "benefits", because they already paid for the fuels. No market failures there. There is a very obvious market failure with the downsides of fossil fuels however (negative externalities), and Puerto Rico claims said companies willingly misled the public about those — that absolutely is reason for a lawsuit.