Earlier quoted context omitted.
Here are the metrics they used for quality of life: Community Engagement Social Support Voter Participation Drinking Water Quality Low Industrial Toxins Low Pollution Health Risk Urban Air Quality
Was like...a survey of the happiness of the population not at least one of the metrics they used? It seems...like a really silly metric not to include in a quality of life ranking.
It's not possible to measure happiness by asking people.
I remember reading a study about, maybe someone can find it.
The only thing you can measure (or ask about) are proxies to happiness.