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.
A tariff is a tax or duty imposed by one nation on the imported goods or services of another nation. Tariffs are a political tool that have been used throughout history to control the amount of imports that flow into a country and to determine which nations will be granted the most favorable trading conditions.