We have a representative body – The Commons. We have achieved representation; we have achieved Democracy.
Democracy has one major fault: Party Politics. This (plus any twit can get elected) is why we need a true Senate.
You can't revise a house full of people allied to party dogma with a house full of people dis-informed by The Daily Mail!
When forming any solution, it's important to regularly refer back to the problem: what ultimately are we trying to achieve?