Increased happiness is very useful, in my view. That does not necessarily require increase in income.
In fact, beyond a certain level (which is not that high), income level and happiness are not correlated anymore. In other words, investing energy into increasing income does at that point rarely result in more happiness. So, why do it, especially if that energy could go more directly into activities that actually increase happiness?
When I read your comments above I feel you have the desperate need to go hug a tree. Try it, it may work wonders.
(And I mean all that in the most positive way possible.)