Erich Hatala Matthes, a Prof. of Philosophy at Wellesley College has authored an argument for the radical redistribution of wealth in the open source journal Ergo. From the abstract:
Museums are home to millions of artworks and cultural artifacts, some of which have made their way to these institutions through unjust means. Some argue that these objects should be repatriated (i.e., returned to their country, culture, or owner of origin). However, these arguments face a series of philosophical challenges. In particular, repatriation, even if justified, is often portrayed as contrary to the aims and values of museums. However, in this paper, I argue that some of the very considerations museums appeal to in order to oppose repatriation claims can be turned on their heads and marshaled in favor of the practice. In addition to defending against objections to repatriation, this argument yields the surprising conclusion that the redistribution of cultural goods should be much more radical than is typically supposed.
An interesting argument, and it sounds to me like he is making a case for cultural justice.