Measures of happiness are nonsense. They are largely determined by by expectations.
Also happiness isn't necessarily the outcome that everyone in society wants. Some may want to maximize happiness -- others may want to maximize something else.
What else would be more important to maximize than happiness?
Means of getting happiness are a different discussion, and what happiness is might differ from person to person. But why would you e.g. accumulate more money or power if it didn't bring you any happiness?
Also happiness isn't necessarily the outcome that everyone in society wants. Some may want to maximize happiness -- others may want to maximize something else.