Could it be that Interactive Democracy could apply pressure to improve the quality of Parliamentary debate?
Within Interactive Democracy, Parliament should present all the arguments, effects and interesting observations about any issue that is about to go to a national ballot. This should represent all the points of view of every Member of Parliament and may be written as a secure wiki type document. It may be constructed on-line before and after the debate in the Commons. The format may be De Bono's PMI (plus, minus and interesting points), perhaps as a SWOT analysis (strengths, weaknesses, opportunities and threats) or any other "thinking tool". Because this analysis would be presented to every voter when they come to cast their vote, it would put pressure on Parliament to do a good job; the electorate would be in a position to appoint or dismiss MPs as they do today.