We do (in the USA) have a legal framework for this already? There are at least a handful of industries where, if it is found that they’ve mischarged, they do have to provide a refund.

Also the thing that annoys me the most is: They didn’t pay the tarrifs, the consumers did. Those price changes were 100% passed onto consumers, and it should be consumers of those products seeing the refunds. If they can prove that they lost revenue based on the price hikes, sure, give some recompense, but they shouldn’t be getting refunds on something they effectively didn’t spend money on