Chris W Rea was retagging some questions with united-states that were about 401ks. 401k is definitely a us tag. There was some discussion of this over on the chat page and it was brought up that 401k is a distinctly US thing. There will never be a question about 401ks that is not also about the united-states.
Do 401k questions all need the United-states tag?
More generically: Do country specific questions need country tags if the subject is by definition, country-specific?