The 16th Amendment allows the Congress to levy an income tax on American Citizens.  I propose to repeal this Amendment to the Constitution, and furthermore, to abolish the IRS.

Government revenue could be replaced with a 1 cent national sales tax on every dollar of items purchased.  Combine this sales tax with a uniform tariff on imports/exports in order to obtain an equivalent revenue for the US government.  This would free Americans from the heavy burden of direct income taxes, while providing a boost to the economy with added spending.