Why? Both corporations and governments are, in theory, supposed to take actions that maximise benefit to their stakeholders. If those stakeholders decide in the majority that morality is a way in which they seek to derive value from either a corporation or a government then those institutions are presumably bound to deliver on those requirements or to be subsequently punished by the majority or their stakeholders. The fact that shareholders (and customers) seem to be more inclined to be demanding moral behaviours from companies, even though they are also (presumably) citizens, is possibly an indication of the fact companies are more responsive in this regard.
This way just creates chaos and rarely results in any long-term change.
And the government changes all the time. It's called voting, and interacting with your representatives. If you have time to be outraged at corporations then you certainly have time to be involved with politics to create change.
EDIT: autocorrect