All overseers shall follow the plans and instructions of the county highway engineer in all matters concerning the expenditure of the funds and improving the roads, and should any road overseer fail or refuse, without sufficient cause, to follow the plans and instructions of the county highway engineer, the county highway engineer may suspend such overseer, and shall at once report the matter to the county commission, and said commission, upon hearing, may remove such overseer from office.
§ 61.250, RSMo