It depends what do you mean on "helping someone"... I help peoples almost every day with advices, or with physical work (to moving furniture, reparing something, etc)...BUT...I almost never help with money (I very rarely lend money to anyone, and I almost never give it to people who beg on the street). For me is a natural thing to help someone, because I know when I need, they help me back (not all, but the majority). But this is not a "trade-off"...I help without compromises, I don't expect anything in return, but it would be nice if you helped me in return.