The best-supported inference from the passage is:
D. The tax-collector wields immense power in the town and causes fear among villagers.
The passage describes the tax-collector as "something quite different from the ordinary citizen" and compares him to "the wall of the world," suggesting his significant authority and the weight of his position. The mention of "nothingness" behind him and the sense of him representing "the end of all things" implies that he instills a sense of fear or reverence in those who come to him with requests.