In the necklace, which character stated, “and what do you wish me to put on my back? ”

Monsieur Loisel made that if I'm not mistaken on regards to going to the ball

The Necklace by Guy de Maupassant? There's no line like that in the story, I'm quite sure. The closest line is probably "And what do you expect me to wear if I go?" and/or "And what do you expect me to wear if I go?" which are both said by Mathilde.

the lowest among the social higher rank were the working class. this class remained detached to the political progression   of the country and was hostile to the other two classes

the term is einsatzgruppen