Democracy cannot be sustained simply by what passionate people oppose. And though movements such as Momentum have important roles to play in influencing political parties, they cannot replace them. Their supporters want to be right – and they often are. But they are rarely prepared to test their principles against the practical business of government. The members of political parties want, or should want, to govern and are prepared, albeit reluctantly, to compromise – with each other, with those they seek to represent, with events – in order to do so. Parties should listen to movements. But movements, if they are to have any practical purpose, must acknowledge that, for all its limitations, the point of politics is power.
Article source: http://www.huffingtonpost.co.uk/peter-bradley/corbyn-trump_b_11758768.html?utm_hp_ref=uk-politics&ir=UK+Politics