For a more academic literature on social class and injustice see my 'Taking Social Class Seriously', published by Human Rights Quarterly. Available here.
You might also want to check out a policy paper I wrote and was published by the Fabian Society. Available here.
For a highly informative site which records extreme poverty as a human rights violation check out this UN page.
One of the best academic critiques of identity politics' neglect of social class is Walter Benn Michaels' The Trouble With Diversity: How we Learned to Love Identity and Ignore Inequality. (2016).
Still a relevant and insightful study of how a neglect of class increases electoral support for the Right in the US see Arlie Russell Hochshild Strangers in their own Land: Anger and Mourning on the American Right (2016)
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