To a narcissist-employer, the members of his "staff" are Secondary Sources of Narcissistic Supply. Their role is to accumulate the supply (in human speak, remember events that support the grandiose self-image of the narcissist) and to regulate the Narcissistic Supply of the narcissist during dry spells (simply put, to adulate, adore, admire, agree, provide attention and approval and so on or, in other words, be an audience). The staff (or should we say "stuff"?) is supposed to remain passive. The narcissist is not interested in anything but the simplest function of mirroring. When the mirror acquires a personality and a life of its own, the narcissist is incensed. When independent minded, an employee might be in danger of being sacked by his employer (an act which demonstrates the employer's omnipotence).
The employee's presumption to be the employer's equal (friendship is possible only among equals) injures the latter narcissistically. The employer is willing to accept his employees as underlings, whose very position serves to support his grandiose fantasies. But the grandiosity rests on such fragile foundations, that any hint of equality, disagreement or need (that the narcissist "needs" friends, for instance) threatens the narcissist profoundly. The narcissist is exceedingly insecure. It is easy to destabilise his impromptu "personality". His reactions are merely in self-defence.
Classic narcissistic behaviour is when idealisation is followed by devaluation. The devaluing attitude develops as a result of disagreements OR simply because time has eroded the employee's capacity to serve as a FRESH Source of Supply.
The employee, taken for granted by the narcissistic employer, becomes uninspiring as a source of adulation, admiration and attention. The narcissist always seeks new thrills and stimuli.
The narcissist is notorious for his low threshold of resistance to boredom. His behaviour is impulsive and his biography tumultuous precisely because of his need to introduce uncertainty and risk to what he regards as "stagnation" or "slow death" (i.e., routine). Most interactions in the workplace are part of the rut