Follow my line of thinking for a moment. Happiness to me means financial security for me and my family. Money pays bills. Money can get me in a safe and secure home. Money buys health insurance. Money pays for medicine. Money pays for therapy.
Money pays for books, music, games, and other things I enjoy. Money can get my son in a good school. Money pays for the things my baby needs. Money can get my baby into quality daycare. All those things would make me happy as hell.
Money may not buy your happiness, but it can buy mine.