Poor relief targets individuals while other institutions serve the totality. [definitional]
Assistance to the poor, as a public institution, thus has a unique sociological character. It is absolutely personal; it does nothing but alleviate individual needs. In this respect, it differs from other institutions which pursue public welfare and security. These institutions attempt to fulfill the needs of all citizens: the army and police, the schools and public works, the administration of justice and the Church, popular representation and the pursuit of science are not, in principle, directed toward persons considered as differentiated individuals, but rather toward the totality of these individuals; the unity of many or all is the purpose of these institutions. Assistance to the poor, on the other hand, is focused in its concrete activity on the individual and his situation. And indeed this individual, in the abstract modern type of welfare, is the final action but in no way the final purpose, which consists solely in the protection and furtherance of the community.
Georg Simmel, on individuality and social…, loc. 411