资本主义的正常运行会产生一个积累财富的阶级，从而出现尖峰分布，在这一点上，荣利和皮凯蒂意见一致（凯恩斯亦然 ） 。
Rognlie agrees with Piketty (as Keynes would) that the normal operation of capitalism produces a class that accumulates wealth, which, as a result, takes on a sharp-peaked distribution.