All of the following are examples of federal involvement in the economy except... All of the following are examples of federal involvement in the economy except... Congress supported domestic production by imposing tariffs on foreign imports. Congress actively attempted to regulate labor relations to boost industrial production. Congress passed legislation to encourage westward expansion and thus expansion of agriculture and markets. It provided financial support for railroad companies through land grants. The federal government used the armed forces as a tool for clearing lands for American settlers in the West, thus boosting agriculture and growth of markets