The Congress declares that it is the policy of the United States and a further purpose of this chapter (1) to encourage countries and areas to establish programs under which their citizens and nationals would volunteer to serve in order to help meet the needs of less developed countries or areas for trained manpower; (2) to encourage less developed countries or areas to establish programs under which their citizens and nationals would volunteer to serve in order to meet their needs for trained manpower; and (3) to encourage the development of, and participation in, international voluntary service programs and activities.