What implicit assumption does Thoreau rely on when he discusses the relationship of money and the soul of Walden

He assumes that money is unrelated to the requirements of soul

Answer: he assumes that money has no relationship with the requirements of soul.

Explanation:

Throughout Walden, Thoreau expresses his opinion about the real value of money. He assumes that unnecessary wealth can buy things which are superfluous and not necessary. He believes that being materialistic distract us from the things that are really important.