We believe that what we possess we don't ultimately own. God is merely entrusting it to us. And one of the conditions of that trust is that we share what we have with those who have less. So if you don't give to people in need you can hardly call yourself a Jew. Even the most unbelieving Jew knows that.
If you keep thinking about what you want to do or what you hope will happen you don't do it and it won't happen.