How would you characterize Crusoe's relationship to Xury? To Friday?

The manner in which these two work side by side is touching and unprecedented: racial bias does not seem to affect their relationship thus far. Xury automatically seems to call Robinson "Master," and he willingly runs errands for the narrator, but for the most part they are equals. Upon exploring the new land, Robinson himself says that they will both go and die together if one must die at all. Out on the sea is the semblance of proprieties, but these two follow their own laws.

Crusoe's relationship with Friday alternates between that of a father and son; master and slave.

We are meant to think that Crusoe is the "master" of Xury, but in reality; Xury is superior to Crusoe. "So Xury and I went to work with him; but Xury was so much the better workman at it."

Do you think that Crusoe took advantage of his relationship with Xury?