It's just an extension of the fact that life seems unfair to the poor. Having less money means that you end up with lower quality food, water, air, sanitation,

It's just an extension of the fact that life seems unfair to the poor. Having less money means that you end up with lower quality food, water, air, sanitation, housing, education, medical care, legal representation, law enforcement, transportation and probably a dozen other things that didn't immediately come to my mind. Societal problems don't spontaneously develop overnight and it won't be quick or easy to address them without causing a lot of other problems. Still, we should be aware of them and their causes.