Metrics of Subjective Wellbeing Limits And Improvements

Around the world, governments are starting to directly measure the subjective wellbeing of their citizens and to use it for policy evaluation and appraisal. What would happen if a country were to move from using GDP to using subjective wellbeing as the primary metric for measuring economic and societal progress? Would policy priorities change? Would we continue to care about economic growth? What role would different government institutions play in such a scenario?