Voters are not being turned into morons: they are already moronic and uninformed too.
One of my very good friends has a saying that I find sad, but true: Average is pretty stupid.
He illustrates it with any number of stories from his sixth grade teaching days, but if you spend any time in public it becomes pretty clear how stupid most people are. It may sound elitist, but it is true. Fortunately it is curable. Unfortunately, few care about being cured.