Over time, leaders lose mental capacities
This is a standard part of feminist theory- basically the idea is that people with no power spend a lot of time wondering what powerful people think, so they tend to have a good understanding of what powerful people think.  But people in a privileged position don't really have any need to think about what less powerful people think- so they don't do it.  And that's where you get the trope of women being mysterious creatures, whereas women seem to understand men perfectly.  The same logic applies to bosses and workers.