That's a nice dream. Let me shatter it: what you suggest might make policy reflect public opinion better, yes. But alas, public opinion is crazy and we can be lucky that policy by and large isn't quite as crazy.
Have a look at Bryan Caplan's "The Myth of the Rational Voter" for more background.
Have a look at Bryan Caplan's "The Myth of the Rational Voter" for more background.