[Brian_K_White]

If you pick it apart, it really means failure to put yourself below.

Outside of acknowledged overt heirarchy like the military where the strict heirarchy has a defensible purpose (there is always some sort of heirarchy, but only in something like a military is a pathological form of it justified) you are theoretically always equal to anyone else, and your order-taking is merely a very limited commercial transaction. You are not actually subordinate to your boss or anyone else.

There is just this very narrow scope where you have voluntarily agreed to accept some specific kinds of directions in a specific context in return for pay.

Swap subordinate for subservient and I would not consider "insubservience" or "failure to be a servant" a very damning charge and I would look more at anyone who thought it was.