With expanded manufacturing in the US the demand for labor would skyrocket. Unemployment would fall and when the demand for labor exceeds the supply, wages would go up. When workers are taking home 100% of their pay and their wages increase due to demand, they will buy more goods and services. This will increase federal tax revenue and also produce more jobs. More jobs will also result in more consumer spending. The net result will be a huge increase in the GDP. Possibly over 10% in the first full year under the Fair Tax and even higher the next year.