Drinking?

I have heard this repeated often, alcohol, in moderate amounts is good for health, while being a social stimulant. Hence I read with great interest, a study about drinking that put this view to test. 

Where, the researchers looked at the standard model of research for moderate drinking studies – dividing people into never drinkers, moderate drinkers, and heavy drinkers – to find that moderate drinkers were the healthiest of the bunch. And they did one more thing. Something really clever. They added in some more parameters. Like socio-economic status, and healthy lifestyle. Now they find, people who are in a comfortable economic status follow a healthy lifestyle, while being moderate drinkers. One can therefore say, these people are moderate drinkers for the sake of health, and not otherwise.

I feel, in such a case, rather than a full fledged attack on drinking, which may incur great costs, why don't we look for improving the socio economic status, at the same cost.