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.
Tariff revenues. See also: Excise tax in the United States. Tariffs were the main source of all Federal revenue from 1790 to 1914. At the end of the American Civil War in 1865 about 63% of Federal income was generated by the excise taxes, which exceeded the 25.4% generated by tariffs. In 1915 during World War I tariffs generated only 30.1% of revenues.