As a result of Ostrinski's teachings, what does Jurgis realize with regard to how he was used by the packers?

From the text:

"There were his Packingtown experiences, for instance--what was there about Packingtown that Ostrinski could not explain! To Jurgis the packers had been equivalent to fate; Ostrinski showed him that they were the Beef Trust. They were a gigantic combination of capital, which had crushed all opposition, and overthrown the laws of the land, and was preying upon the people. Jurgis recollected how, when he had first come to Packingtown, he had stood and watched the hog-killing, and thought how cruel and savage it was, and come away congratulating himself that he was not a hog; now his new acquaintance showed him that a hog was just what he had been--one of the packers' hogs. What they wanted from a hog was all the profits that could be got out of him; and that was what they wanted from the workingman, and also that was what they wanted from the public. What the hog thought of it, and what he suffered, were not considered; and no more was it with labor, and no more with the purchaser of meat. That was true everywhere in the world, but it was especially true in Packingtown; there seemed to be something about the work of slaughtering that tended to ruthlessness and ferocity--it was literally the fact that in the methods of the packers a hundred human lives did not balance a penny of profit."