The basic idea is that people go to great lengths to repress awareness of mortality. Studies show that we create three existential buffers to protect us from this knowledge: Consistency allows us to see the world as orderly, predictable, familiar, and safe. Standards of justice allow us to establish and enforce a code of what's good and fair. Culture imbues us with the sense that we have contributed to, and are participating in, a larger and enduring system of beliefs.
Anything that threatens these buffers exposes us to the looming reality of death. Change an employee's routine, and you've undermined the consistency barrier. Tell a salesperson he'll no longer be evaluated on the basis of revenue and now must hit certain cross-selling and teamwork targets, and you've attacked his standard of justice. Alter the company's mission, and you've pierced the culture buffer by requiring him to reconstruct his worldview.
Free advice: It probably would not be wise to tell your employees that the reason they are really upset about your new policies is because of a newly-revealed unconscious awareness of the fact that they will one day die.
