The US needs public identity services which large platforms like Amazon can be made to integrate with.

In this case the idea would be to link accounts on Amazon with these services, so that users can filter only by reviews written by individuals that have gone through the necessary steps to verify their identity more concretely. Government should step in here, not necessarily as the only provider of these services, but as an alternative to the current insecure and inefficient model of doing this all ad hoc across any number of companies individually.