If the workers could collectively use those stocks to elect a representative of the worker's shares you can generate class consciousness with it. The general idea being that you create class war in the workplace because having the shares creates a monetary interest in paying attention to company decisions and what your representative is doing, which means workers learning significantly more about how their company is run and the difference of interests between the workers and the bosses. The idea being that this would generate massive amounts of class consciousness.

Without that representation though it just leads to worker confusion over their interests. It leads them to assuming that they share the interests of the capitalists.