Abolish the current tax system, and replace it with a flat tax

Due to the complexity of the US TAX CODE, and the seemingly endless number of "loopholes", deductions, and credits, as well as the numerous quantities of taxes levied on goods and services: ELIMINATE the current tax code, and replace it with a FLAT TAX that covers all other taxes, interstate tarrifs, and the like, on ALL US CITIZENS and US CORPORATIONS operating solely within the borders of the United States.
The FLAT TAX would EITHER be collected at the point of sale of goods and services, OR collected in one's paycheck, and distributed directly to the US TREASURY.