True, but the organization of economy and society that made mass movements possible in the past does not exist anymore. Mobilizing 10 thousand workers is much easier when they work for the same plant and live in the same neighborhood than when they work for a myriad of smaller firms and live apart in the suburban wasteland.
Mobilizing mass movement today requires much more networkig and organzational resources, which in turn requires cutting deals and compromising. There will be no mass movement without a social base and organziational resources, and that requires some degree of cooperation with the existing political structures.
wojtek