Just because something happens doesn't mean that its intentional. I think this is really a byproduct of having no one that stands up for the injustice. Who is the voice for people in prison? No one wants to take credit for family members that are there and the ones that get out usually struggle to get back on their feet let alone drive change in the system.

I think another good example of this is through public infrastructure. Look at any poor neighborhood in a city and look how little public infrastructure is invested in those areas. Usually big busy roads with no sidewalks, crosswalks, etc. The city doesn't hate those areas, it's just that the people that live in those areas aren't effective (or unable) to lobby elected officials to invest. Also there is a little bit of a self fulfilling prophecy with lack of investment causing less businesses to want to invest, etc.