when I went to school a poor black kid stole a portion of my lunch every single day in 2nd grade (stupid policy that you had to leave your lunch on an unattended desk, he knew which bag was mine and took the granola bar.) my parents moved me to a catholic school which had basically no black kids. the bullying was still there but nobody ever stole from me or really anyone else. no fights basically ever.
we move, I go back to a more diverse school. fights, my graphing calculator stolen... what’s the possible benefit of having poor people in your school? until social programs make it so my lunch doesn’t need to be stolen to feed a kid, I fail to see how the non poor students are better off.