That might be true only when the givers needs are already met and satisfied ,then there is enough to give away to someone else. Very needy people in general do not give away anything if they need it themselves to survive. Of course there are the weak minded people that can be convinced if they do a sacrificial suicide bombing they will be rewarded with many virgins in the afterlife. But then its not really them "giving anything" they are hoping for a return on their investment of their life, with the reward of sex from many virgins.
