Stranger than fiction
The tax man is your stereotypical beurocrat. His life is predicted by time. He counts his brush strokes as well as footsteps. He is stuck in a routine. I think that the reason the narrator is finding a way to kill him because no one can ever be happy living like a robot. He does the exact same thing day in day out. I believe that the reason he is sent to meet the baker is to break his routine. When he looks at her he sees things differently. I believe he feels as if she does everything the exact opposite of him. I think that she is extremely important to the plot thus far because she introduces change. She is also has the same reaction most people feel inside when being audited by a tax official. She is outraged and she is not afraid to show it.
I think that the anarchist is the ultimate forbidden fruit for the tax man. She is a client as well as the complete opposite. He does not know exactly how he should act towards her. He is conflicted as to whether he should see her as a client or as a lover. His brain tells him one thing but he wants to do another. I think that this relationship by its self makes for a great story. And with him hearing voices I think makes it ten times better.
I am surprised that more people are not interested in this movie. I find it to fairly comical and similar to the invention of lying.