To add to this, I am what is called a subclinical psychopath. An estimated 1/100 of the world's population are psychopaths. I have not felt 'happiness' in years--I am currently eighteen years old. In fact, I am probably literally incapable of feeling happiness. I am capable of feeling momentary contentment, etc. but never anything lasting. No amount of money will make me happy. However, I am always on the lookout for thrills. Money is absolutely necessary in my world in this respect. Delicious foods, speeding (120 mph), sadistically derived sexual pleasure--be it through the debasement of others or through rape/physical torture--are all appealing, to me. Money can provide me with entry into a fine dining establishment, a nice car, and a sex slave (they exist, even today. Human trafficking, etc.). I am entirely serious. Btw, psychopathy is, again, not that rare. You probably have a friend or family member who you are unaware is a psychopath that is a psychopath.

Happiness is an emotion. What it's derived from varies from person to person. However, there are universal derivatives of happiness that, generally speaking, money will aid in bringing about for a person. Therefore, money directly aids in the acquisition of the sensation of happiness. However, it only helps. Money does not automatically = happiness. You still have to work for it. It's very much like having a car as opposed to only your legs. Although it will help get you places, you still have to drive it to get to where you want to go. However, it would be much easier to drive than to run on foot.