You may or may not think much of the analysis in the article, Dems In Tug-Of-War Over Occupy Wall Street, however, I believe the following quote explains the necessity of the Occupy Movement.

As time goes on individual Democrats will be the object a tug of war, with the corporate and business wing of the party pulling one arm, and progressives and grassroots activists yanking at the other.

If we don’t tug on our side of the rope, where do you think the Democratic Party will go?