"In Jane Austen's world, human worth is to be judged by standards better and more enduring than social status; but social status is always relevant. With amused detachment, she registers exactly the social provenance of each of her characters, and judges them for the ways in which they judge each other. The importance assigned to class distinction is the source of much of her comedy and her irony, as of her social satire."
McMaster 129

I think this quote is very important in picking out one of the most prevalent aspects of Austen's novels. A character's wealth, how they obtained it, what they do with it, and what happens to it, is a point that Austen makes known with all of her main characters. Through this, though, she also makes known that money is not always an important issue in her novels. So why does she make a point to let the reader in on the monetary value of all of her characters?
For Austen, it is a means to show that money is not something that should be of importance. In her time, money was important, because it was a means to survive, it was a way to show hierarchy, but that is what Austen wants to banish; she wants people to marry for love, and not for money. Now, that's not to say that that didn't happen, I am sure many people married for love during that time, but there were also many occurrences of people marrying for money too, to preserve a name, or preserve a family. Also, Austen showing the value of a family also helped to put people of certain wealth into perspective. The Bennets, for instance, were a very happy family, despite not having a lot, and they managed to make do with what they had. At first, Mr. Darcy, seemed like the kind of man that kept to himself, and that included his wealth, and as his polar opposite, Mr. Bingley just wanted everyone to have a good time, and to enjoy his company.
This idea that money can create a society that is basically a slave to their fame and fortune is mostly what Austen wants to make known about her society, and wants the reader to learn about. Austen wants readers to see that there is more to a person than their title, and more than the dowry that they get in a marriage; she wants us to see the characters as people, and wants us to relate to them.