Whereas public bodies are to be financed through the State Budget, which can be reinforced by means of Budget Support programs, other types of stakeholders need to either generate revenues by selling their services or products in the open market, or receive grants to implement those activities of public interest that would otherwise be unsustainable. These grants can come from the State itself, from philanthropic organizations or from international donors. In all three cases, grant schemes are usually devised to support individual organizations either in the implementation of concrete operations –projects– or in their daily activity –structural funding–, with mixed results both in terms of effectiveness and sustainability.