Mo. Rev. Stat. § 115.069: Election judges paid by whom (Jackson County).

In any county of the first class containing the major portion of a city which has over three hundred thousand inhabitants, the salaries of election judges at all county and state primary, general and special elections shall be paid from the general revenue of the county, unless the city submits a question or candidate at the election, in which case the salaries of election judges shall be paid one-half from the general revenue of the city and one-half from the general revenue of the county.