Barth, CD I/2, p.693:

All other forms of Church government are, therefore, false. In some cases the rule of Jesus Christ may assume merely the role of a decorative flower of speech, while in truth real control is exercised by the spurious, horizonless faith of men joined together in the Church. Or in other cases the rule of Jesus Christ may be seriously acknowledged in form, but it is represented as a direct leadership of the Spirit, and it is only a secondary question whether the point at which the leadership of the Spirit touches and seizes the Church is supposed to be an infallible Pope or Council, or the office of an authoritarian bishop, or that of an hypostatised pastor, or a free leadership or inspired individuals in the community, or finally the whole community as such. The false thing in all these types of Church government is the ambiguity with which the rule of Jesus Christ is (perhaps very seriously) asserted, but Scripture is ignored as though it were not the normative form of this government for this intervening period. If we speak of a purely heavenly lordship of Jesus Christ, and then of one of these earthly manifestations of His sovereignty, we may speak "enthusiastically," but in the last resort we are still speaking of the autonomy of human faith, and therefore not of the Church of Jesus Christ.