FBI agents are not paid in hourly wages, they are paid through the federal government system GS ratings which provides agents an annual salary rating for years served.
The tariff of the United States, like all actual protective tariffs, is partly revenue and partly protective, its original purpose of yielding revenue having been subordinated to that of giving protection, until it may now be best described as a protective tariff yielding incidental revenue.
The federal government has used forms of commercial restriction as a source of revenue and to protect American industry and labor. Before the Civil War, the federal government obtained close to ninety percent of its revenue from tariffs, and because of this, the government avoided income taxation. Americans have used protective and revenue tariffs. Protective tariffs help new American industries compete with established foreign industries.