Bluntly put, when an institution is given power over children, more than that of a family, and the auditing is lax, you're gonna get maltreatment, and from there unmarked graves. Indigenous, orphans, those "born out of wedlock" in the old days, any child prised loose from the family is at tremendous risk of physical abuse, sexual molestation, death, and discarding.
I'm not sure what it says about the human race in general but it isn't very cheery.