Why Did Lydia Run Off With Wickham?

In Pride and Prejudice, the youngest of the Bennet girls, Lady Lydia, almost brings public shame to the Bennets by flirting and then recklessly deciding to get away with charming Mr. Wickham, which his character revealed to be manipulative and antagonistic.
Lydia is a naïve young lady, who doesn’t know Wickham’s true identity. She fells in love with Mr. Wickham and agrees to run off with him. Elizabeth learns that Lydia has run off with Wickham. This scandal could destroy the family, so Elizabeth's uncle and father strive to tune the renegade couple down. Elizabeth's uncle saves the day and brings the two younger 'uns returned as a accurate married (and unapologetic) couple. When Lydia lets slip that Darcy used to be at her wedding, Elizabeth realizes that there is extra to the story and writes to her aunt for greater information.
Wickham was unwilling to marry Lydia at first but an interception of his “get away” by Mr. Darcy and a logical proposal gave Wickham no chance to marry Lydia. Wickham was a liar, owed a huge debt which he plans to pay it off by marriage. He married Lydia in efforts to take money from the Bennet Family to pay off his debt. Furthermore, Lydia desires men a lot which led her to run away with Wickham. They’re financially unstable and end up asking Elizabeth for money when she’s married to Darcy. The text state “My youngest sister has left all her friends – has eloped – has thrown herself into the power of Mr.Wickham... had his character been known, this could not have happened”. This quote clearly implies that if Lydia knew Wickham’s true intention, this situation would have been prevented.