In the US, negligence as a tort is a four-pronged test. In the case of Equifax, did they have a duty to protect your PII? Did they breach that duty? Was that breach the proximate cause of your PII being disclosed? Did that disclosure result in an injury?
Absolutely, and there needs to be a statutory value placed on PII so that the Equifaxes of the world will have to be insured, and insurers will perform due diligence.