How has Scrooge's perspective on money and happiness changed?

I assume your question pertains to Stave Five? If so, Scrooge's perspective on money has completely changed due to the lessons he learned from the three spirits. Scrooge buys Bob's Christmas goose, donates money to the men who came to his office the day before for their charity, spends the day in celebration with his nephew, socializes with the people he meets, gives Bon Cratchit a raise, and takes care of Tiny Tim's needs.