A real focus on happiness is not politically neutral. We know that the most happy societies are the most equal. That is why Scandinavian countries tend to come top of international happiness surveys. And the recent survey that found only 6% of the Chinese population was happy, in their now very unequal society, led to the Chinese government banning references to it. (Denmark came top with 72% happy.)
Inequality makes people unhappy. Poverty makes people unhappy. Consumerism makes people unhappy. A real focus on increasing happiness would lead to very radical change in society. Bring it on!