290.220. It is hereby declared to be the policy of the stateof Missouri that a wage of no less than the prevailing hourlyrate of wages for work of a similar character in the locality inwhich the work is performed shall be paid to all workmen employedby or on behalf of any public body engaged in public worksexclusive of maintenance work.
(L. 1957 p. 574 § 2)(1959) Prevailing Wage Act sustained as against attacks claiming it (1) constituted arbitrary classification; (2) unconstitutionally delegated legislative power without standards; (3) is special legislation; and (4) was violative of a city charter adopted under § 19, Art. VI of the constitution. City of Joplin v. Indust. Comm. (Mo.), 329 S.W.2d 687.
(1981) Industrial development projects are not subject to the Prevailing Wage Act unless the projects constitute "public works" and involve workmen employed by or on behalf of a public body engaged in public works. State ex rel. Ashcroft v. City of Sedalia (Mo.App.W.D.), 629 S.W.2d 578.