How can the Scrum Master become that True Agile Leader, helping the organization to become more Agile?

Imagine the stress of getting to work and observing your heart rate rising. It feels as if everyone is out for blood, anything you say can be used against you no matter how genuine it may seem-and managers don't really know what's going on either; they've got favourites among their team members who make most decisions behind closed doors with just a few people involved in each one (those "in the know").