How does Jurgis hurt his hand? What injustice of capitalism does this incident illustrate? In what way does Jurgis injury benefit him?

One morning, as Jurgis passes by a furnace, the machine blows out spraying fire and melted steel over two men. Jurgis attempts to help them, but he only loses the skin on one of his hands by doing so. The doctor bandages him and he cannot work for eight days without pay. That's how Jurgis is rewarded by the company for helping an employee. I'm not sure how this benefits Jurgis but at least isn't fired for being off so long which is a good thing.

It benefits him because he can go home and rest and play with his boy.