How is it different from previous forms of social injustice? Why is this a new kind of systematic prejudice and discrimination? - Firstly, the "old" way was entrenched in law and custom, whereas now we look at entrenchment in automated evaluation and selection practices. Second, before it was easy to identify individuals and groups engaging in customary social prejudice; but now behind algorithms and web interfaces, the human perpetrators of discriminatory practices may find it hard to identify themselves as prejudicial, let alone be confronted by society.
Of course there is a history of advocacy for responsible coding practice, e.g. a recent example. But for the most part these come across as overbearing warnings like "Is your smartphone listening to you?". Still, one can make a case that "justice" were trumped by economic interest from this article: Secret Algorithms Are Deciding Criminal Trials and We’re Not Even Allowed to Test Their Accuracy.
Hiring and firing people are certainly not an easy job, and there is an awful lot of it going on. Unsurprisingly algorithmic selection of people is both widespread and entrenched.
Question: Is there any work done in a formal context, in ethics or law, to meet (possible) resurgent systemic biases?
Some further reading: -