There are numerous examples of democratic systems that are rife with corruption or paralysed by disagreement. Even in benign parliaments, It is often an open question as to whether the work they do really benefits the majority of people.
Their counterintuitive conclusion is that randomly selected legislators always improves the performance of parliament and that it is possible to determine the optimal number of independents at which a parliament works best.
“we think that the introduction of random selection systems, Rediscovering the wisdom of ancient democracies, Would be broadly beneﬁcial for modern institutions. ”