They have no claim to wealth they create, no say in governance, and no vote for the board of directors. Only those who own stock can vote, like an earlier time in America and England, when only those who owned land could vote. Employees are disenfranchised. Stockholders alone are sovereign in the society of the corporation. Others work there - as serfs labored on the lords' land.
Workers live their daily lives there, but they live as squatters.
Since a layoff may come at any time, they're made to feel lucky not to be kicked off the property. These days, investors may not actually own stock at all but may lease it, or hold only an option to buy it. Still, even these instruments allow us to extract the corporation's wealth. Indeed, creating this shareholder value is considered the sole aim of the public corporation - an aim to which all other needs are subordinate. As business executives we may use up all our employees' waking energies, but we need not concern ourselves about whether employees can keep food on the table.