Who guards the guards?
Parliamentary democracy has various safeguards: the higher House of Lords, the Committee on Standards in Public Life, the media and the fact that MPs can be voted out in the next election. Some would say that this isn't enough as the majority of power in Parliament rests with the Prime Minister and the government. Who checks on them?
Interactive Democracy may improve accountability to the people by giving them the ability to vote on any single issue. It may even be possible, should an MP be discovered lying to the house, that the public creates a vote of no confidence and ban them from parliament. It may also be sensible for the Committee on Standards in Public Life to make public their recommendations and allow the public to vote where necessary, instead of letting the Government decide the fate of the condemned, as is the case today.
The point is that ID creates a balance of power between parliament and the electorate in a way that doesn't exist today.
Who guards the guards? Parliament guards the interests of the electorate and the electorate guard Parliament.