I love some of Lessig's ideas, but he doesn't have a prayer of getting into any position to implement them. The current electoral system is rigged so that only the two major parties have any hope of getting a candidate elected to national office. You have to get inside the system in order to have the power to change it -- But why in the world would either party allow in someone whose stated goal is to upset the apple cart and make it harder for the party to win in the future?
The only people in favor of electoral reform are those outside the system. The ones inside the system benefit too much from the status quo.