A win for everybody

A long-held belief (I know, Western superiority): On two specific days each year, Americans take our stuff to a designated pickup point in each state and territory. After two or three days of stuff piling up, military and civilian transport aircraft arrive and load up all the stuff. The aircraft fly to Third World countries and land, where paid local crews unload and pile up the cargo. Citizens of said Third World countries then take all the stuff and do as they will. In several weeks, the stuff will have become houses, shops, steel reclamation businesses, auto factories, and etc. In six months, the GDP of all Third World countries will have increased.