Perhaps this is off-topic, but going from $0 income and $0 savings two years ago to mid-6 figures has not affected my happiness. The things that have made me happier have all been free or fairly cheap.
Money doesn't make you happy, but not having money _can_ make you unhappy.
Not that it always does; it depends on your dependencies, in both senses. With a wife, child and mortgage I would be pretty unhappy if my income dropped to 0.
