Gatsby's offer of work to Nick is not just a simple employment opportunity. It is a way for Gatsby to strengthen his relationship with Nick and to win his favor. Gatsby knows that Nick is Daisy's cousin and that he is the only connection between them. Therefore, he wants to make sure that Nick is on his side and can help him reunite with Daisy.
When Gatsby first proposes the job to Nick, he says, "I want to do something big...something that'll show how stupid Tom Buchanan really is" (Fitzgerald, 74). This statement indicates that Gatsby sees Nick as a potential ally in his quest to win Daisy back from Tom. Gatsby also reveals his true motives by saying, "I understand you're looking for a business gonnegtion...Well, this would be a step toward it" (Fitzgerald, 75). Here, Gatsby is not only offering Nick a job but also suggesting that he can help him advance his career.
Furthermore, Gatsby's offer of employment is also a way for him to show his wealth and success to Nick. He takes Nick on a tour of his mansion and shows him his expensive car and beautiful clothes. By doing so, he wants to impress Nick and gain his respect and admiration.
In conclusion, Gatsby's offer of work to Nick is not a simple job opportunity but rather a strategic move to win Nick's loyalty and gain his help in winning Daisy back. It is also a way for Gatsby to display his wealth and success to Nick and impress him.