The allusion in the passage clearly shows that Earnest is wealthy.
Allusions refer to person, place, idea or things explicitly. In detail, description is not provided about the person it refers. In it the author expects the reader to gain the knowledge and importance of text.
Literary allusion made, "He's the Bill Gates of Mayville", here it refers to the person 'Bill Gates' who is the second wealthiest man of the world.