According to traditional Jewish sources, if a stranger asks you for food, you must give him or her a loaf of bread and, if it is before Shabbat, three meals worth. If you know the person, you must give him or her whatever is in accordance with his or her honor (Maimonides, Laws of Gifts to the Poor 7:8). At the same time, Jewish communities for over a thousand years established a soup kitchen to give the poor food and a communal fund to provide clothing and other necessities.
Do such communal institutions absolve the individual from donating anything to a beggar? Frankly, Jewish law is not clear about that. Furthermore, Jewish law establishes some duties of the poor person – e.g., to try to get a job – and one never knows whether the beggar on the street has done so. Furthermore, one has a primary duty to sustain oneself and one’s family, and so for most of us there is a limit to how much we can contribute to others. Giving money to beggars is not a very thoughtful way to distribute whatever you can give to charity. Worse, the beggar may be trying to dupe you into thinking that s/he needs money when s/he does not, and the beggar – especially if strung out on drugs – may actually pose a threat to your safety. I discuss these conflicting factors and how the Jewish tradition deals with poverty generally in Chapter Six of my book, To Do the Right and the Good: A Jewish Approach to Modern Social Ethics.
In the end, I personally give fully 99.9% of my charity money to established institutions of education, religion, and social service, including my synagogue, Federation, Jewish Family Service, the American Jewish University, Camp Ramah, Los Angeles Hebrew High School, the Masorti Foundation, etc. I also give money to interfaith and secular charitable institutions – e.g., United Way, Red Cross, FaithTrust Institute (to prevent violence against women and children), etc. – as well as some cultural ones (the symphony, the theater, etc.) – although, in keeping with Jewish law, I give much more to Jewish causes than to non-Jewish ones. Jewish law asks us to give in concentric circles – most to our own needs and to those of our family, next most to the needs of our local Jewish community, then to the needs of Jews in other communities, and next most to non-Jewish causes. (Again, see that chapter for references and more explanation.)
Do I give to a beggar who confronts me on the street? Usually yes, just because the human interaction involved in that encounter makes me feel terrible if I do not, but I always worry that I am adding to the beggar’s dependence on such handouts and thus harming more than helping him/her – and I never give very much that way.