They are not. The data clearly demonstrates that companies operate at the minimum profitability that is tolerated by creditors, and that employees and management seek the highest extraction possible that creditors will tolerate.
Government bureaucrats demonstrate exactly the same behavior, but government, because it is a monopoly cannot be ‘corrected’ by the forces of competition, or in practice, by law, and therefore companies tend to have very short life spans, and even very big and successful companies have very short periods at the top, where governments can persist as corrupt enterprises indefinitely.
https://www.quora.com/Capitalism-Why-are-investors-and-shareholders-profitseekers-alone