the tail (is) wagging the dog
idiomPart ofdog
the tail (is) wagging the dog — idiom
1. A situation where a less important part controls the more important whole.
1.idiom
Definition
A situation where a less important part controls the more important whole.
Example
In that company, the tail is wagging the dog, with interns making decisions.
When a small group dictates policy, it's the tail wagging the dog.