Criticisms of corporations
The notion of a legally sanctioned corporation remains controversial for several reasons, most of which stem from the granting of corporations both limited liability on the part of its members and the status and rights of a legal person. Some opponents to this granting of "personhood" to an organization with no personal liability contend that it creates a legal entity with the extensive financial resources to co-opt public policy and exploit resources and populations without any moral or legal responsibility to encourage restraint.
Divisions between labor, management, and owners
The directors of such [joint-stock] companies, however, being the managers rather of other people’s money than of their own, it cannot well be expected, that they should watch over it with the same anxious vigilance with which the partners in a private copartnery frequently watch over their own.... Negligence and profusion, therefore, must always prevail, more or less, in the management of the affairs of such a company.
The context for Adam Smith’s term for “companies” in the Wealth of Nations was the joint-stock company. In the 18th century, the joint-stock company was a distinct entity created by the King of Great Britain as Royal Charter trading companies. These entities were sometimes awarded legal monopoly in designated regions of the world, such as the British East India Company.
Furthermore the context of the quote points to the complications inherent in chartered joint-stock companies. Each company had a Courts of Governors and day-to-day duties were overseen by local managers. Governor supervision of day-to-day operations was minimal and was exacerbated by the geography of the 18th century.
Bribery and corruption were inherent in this type of corporate model as the local managers sought to avoid close supervision by the Courts of Governors, politicians, and Prime Ministers. In these circumstances, Smith did not consider joint-stock company governance to be honest.  More importantly, the East India Company demonstrated inherent flaws in the corporate form. The division between owners and managers in a joint-stock company, and the limited legal liability this division was based on guaranteed that stockholders would be apathetic about a company's activities as long as the company continued to be profitable. Just as problematic, the laws of agency upon which the corporate form was based allowed for boards of directors to be so autonomous from and unconstrained by stockholder wishes that directors became negligent and ultimately self-interested in the management of the corporation.
Legal Scholar and Professor of Law at the University of British Columbia Joel Bakan describes the modern corporate entity as 'an institutional psychopath' and a 'psychopathic creature.' In the documentary The Corporation, Bakan claims that corporations, when considered as natural living persons, exhibit the traits of antisocial personality disorder or psychopathy. Also in the film, Robert Monks, a former Republican Party candidate for Senate from Maine, says:
The corporation is an externalizing machine (moving its operating costs to external organizations and people), in the same way that a shark is a killing machine.— 
Analogy with totalitarian regime
Noam Chomsky and others have criticized the legal decisions that led to the creation of the modern corporation:
Corporations, which previously had been considered artificial entities with no rights, were accorded all the rights of persons, and far more, since they are "immortal persons", and "persons" of extraordinary wealth and power. Furthermore, they were no longer bound to the specific purposes designated by State charter, but could act as they choose, with few constraints.— 
When the corporatization of the state capitalist societies took place a century ago, in part in reaction to massive market failures, conservatives--a breed that now scarcely exists--objected to this attack on the fundamental principles of classical liberalism. And rightly so. One may recall Adam Smith's critique of the "joint stock companies" of his day, particularly if management is granted a degree of independence; and his attitude toward the inherent corruption of private power, probably a "conspiracy against the public" when businessmen meet for lunch, in his acid view, let alone when they form collectivist legal entities and alliances among them, with extraordinary rights granted, backed, and enhanced by state power.— 
Chomsky contends that corporations transfer policy decisions out of the hands of the people and into corporate boardrooms, where public oversight is limited. The extensive financial resources of corporations and the extent to which they're employed to influence political campaigns in the United States has also been implicated as a way in which corporations undermine the democratic institutions in a society.
“No other institution in American history—not even slavery—has ever been so consistently unpopular...with the American public. It was controversial from the outset, and it has remained controversial to this day.”
John D. Rockefeller was one of the first to experience that paradox in a spectacular and personal way. By the last decade of the Nineteenth Century, Rockefeller found that he had become “the most hated man in the world.”
Around the middle of the Twentieth Century, the economist John Kenneth Galbraith noted that the corporate businesses which foreign visitors came to see and marvel at, as “showpiece[s] of American industrial achievement,” were the very same ones that government attorneys scrutinized in their search for monopolistic wrongdoing.
- Adam Smith The Lost Legacy.com
- Adam Smith, An Inquiry into the Nature and Causes of the Wealth of Nations 741 (Clarendon, Oxford 1776).
- Bakan, Joel (writer) The Corporation (2003) (Documentary)
- Robert Barksky, Noam Chomsky and the Law 
- Chomsky, Noam (1999). Profit Over People: Neoliberalism and Global Order. New York, New York, United States: Seven Stories Press. p. 175. ISBN 978-1-888363-82-1.
- Ned Resnikoff. 2007 Corporations Versus Democracy. The Nation. 
- Irving Kristol. Reflections of a Neoconservative. NY, 1983. p. 204.
- Charles Churchyard. “The Corporation and John D. Rockefeller’s Bewilderment.”
- David F. Hawke. John D. NY, 1980. Ch. 36.
- John Kenneth Galbraith. American Capitalism. NY, 1956. p. 91.
- CorpWatch, a corporation watchdog organisation