Competition

The last post suggested that the ability to change and evolve is an important strength of democracy. Perhaps competition is the key ingredient.
Interactive Democracy could be seen as an ecosystem for ideas, where the fittest survive.
Sure, Parliamentary Democracy also promotes competition but it is far less dynamic, being constrained by the protocol of the Parliamentary life cycle. It also usually ties a politician, and their success, to an idea. ID separates the two, allowing each to be examined independently and directly: the politician assessed for political skills and the idea on its own merits. I expect this would foster greater creative vigour, especially as many ideas would come from those without the burden of cultivating a political career or social standing.