What was the reasoning behind social credit system? To keep track of bad actors or create surveillance nation?

On a side note, this is what happens when "technocrats" become the ruling class in overwhelming majority. Ability to apply technical solution to societal problems. Most of the China's ruling class are technocrats. We need anthropologists, social scientists, philosophers as law makers. Yes technocrats should be there in the mix too but they alone won't fix societal problems.