Democracy, if it is to exist psychologically as well as politically, demands organization of the various interests, and their representation, in political bargaining, by men who enjoy whatever influence is justified by the numbers and enthusiasm of their constituents. I do not mean that these representatives should be a substitute for Parliament, but that they should be the channel by which Parliament is made aware of the wishes of various groups of citizens.
Source: Power, 1938.
More info.: https://russell-j.com/beginner/POWER18_070.HTM