How does Michels' 'iron law of oligarchy' explain the concentration of power in bureaucracies?

Michels' 'iron law of oligarchy' suggests that in any organization, no matter how democratic it starts, a small group of leaders will eventually gain most of the power. This happens because leaders often have more knowledge and experience, which makes it easier for them to make decisions and take control. In bureaucracies, where rules and procedures are very important, this concentration of power can lead to a situation where the interests of the few overshadow the needs of the many. For example, in a large company, the executives might make decisions that benefit themselves or the upper management rather than the employees or customers. Thus, even in organizations meant to be fair and equal, power can become concentrated in the hands of a few, which can lead to challenges in how the organization operates.