The wording of Article 130 of the Treaty makes it clear that the principle of independence concerns the performance of ESCB tasks conferred upon the ECB by the Treaty itself, that is, central banking–related activities.
You could include other countries and regions, such as the euro area, for instance, but it would only complicate matters and not add much to the analysis. In respect of returning to economic growth, Emerging Asia and Latin America seem to be ahead of the US, whose growth is still fragile.