But usually as you said in your previous post, aren't we lead to make such decisions based on the animated views of our mate Kevin down the pub, or the paper we read and programmes we watch?
Yes there are issues surrounding the use of referendums (cost, practicalities etc) but how many of us truly know what decisions our representatives are making for us? I am not as convinced as you seem to be that we are such an enlightened politically and socially adept nation (broadly speaking of course).
This is evident by the number of people who are more willing to vote on who should win a tv celebrity contest than who is running our country and making big decisions for us!