The Cholesterol of a Healthy Society

If you have high cholesterol the doctor will tell you you're at risk for heart disease and prescribe statins. If your society is poor, a sociologist will tell you that your population could be happier, and suggest that you raise the standard of living. At some point we expect that drug companies will prove the connection between their drug and lowering deaths from heart disease. Shouldn't we also expect that our sociologist will prove the connection between standard of living and happiness? What if while focusing on standard of living we actually ignore things that actually do improve happiness?