Sentence:  But while the corporation has all the disadvantages of the socialist form of organization ( so cumbersome it cannot constructively do much of anything not compatible with its <WSD>need</WSD> to perpetuate itself and maintain its status quo ) , unluckily it does not have the desirable aspect of socialism , the motivation to operate for the benefit of society as a whole . 
Meaning of the word marked with <WSD> tags:  the psychological feature that arouses an organism to action toward a desired goal; the reason for the action; that which gives purpose and direction to behavior