Those who see pain, witness struggle know how hurtful it can get. Chances of one getting aid who is in a similar situation which was experienced by another are higher as compared to those who are yet to face that particular experience.
In most scenarios, the poor are unfortunate to be at the centre position where pain, struggle, trouble among all hurtful occurrence from every angle. Hence, if one is in trouble, or hurt or need- go to the poor people. They’re the only ones that help–the only ones.