What atrocities of teh meatpacking industry does Sinclair reveal in this chapter?

Lithuanians were now the cheaper labor ,and even their jobs are being threatened by the Slovaks, for they are the poorest immigrants yet and will work for very little money. Packingtown is a place for “rats in a trap,” though as a socialist, Grandmother Majauszkiene believed that soon the people will rise up and murder the packers. The pay is better in America than it is in Lithuania, but the cost of living is much, much higher.