pride & prejudice as a novel of matromony

I think much of this theme has to do with women and marriage. The men of high social class tend to hold all the cards. Marrying into money seemed to be the goal of most women who were not borne into money to begin with. Check out this excerpt from GradeSaver,

Austen is critical of the gender injustices present in 19th century English society. The novel demonstrates how money such as Charlotte need to marry men they are not in love with simply in order to gain financial security. The entailment of the Longbourn estate is an extreme hardship on the Bennet family, and is quite obviously unjust. The entailment of Mr. Bennet's estate leaves his daughters in a poor financial situation which both requires them to marry and makes it more difficult to marry well. Clearly, Austen believes that woman are at least as intelligent and capable as men, and considers their inferior status in society to be unjust. She herself went against convention by remaining single and earning a living through her novels. In her personal letters Austen advises friends only to marry for love. Through the plot of the novel it is clear that Austen wants to show how Elizabeth is able to be happy by refusing to marry for financial purposes and only marrying a man whom she truly loves and esteems.