It is thought that Zuryo saved a large amount of money by collecting taxes from millionaires, due to their authority and developed arbitrary regional politics, leading to Kokushi kasei joso (appeals or armed struggles against Kokushi) which often happened from the end of the 10th century to the middle of the 11th century.
受領は、大きな権限を背景として富豪層からの徴税によって巨富を蓄え、また恣意的な地方政治を展開したとされ、その現れが10世紀後期～11世紀中期に頻発した国司苛政上訴だったと考えられてきた。