Companies have to comply with subpoenas (unless they can beat them in court, and with an alternative of going to jail). Subpoenas are supposed to be targeted at individuals and need some kind of process, usually judicial, each time one is issued. Mass surveillance - the Anthropic blog post raises the possibility of using AI to classify the political loyalties of every citizen - is a different thing.

A subpoena isn't "simply asking." Subpoena literally means "under penalty" in Latin. If the company does not comply they will be held in contempt of court and someone may well go to jail.