Because customers will ultimately pay a higher price for the goods in question, which is fairly terrible for a consumption-based economy.

Manufacturing will always happen where labor costs are lower (assuming the other requirements are in place), or lowest: automated. And American companies are already well into the process of moving production from Asia to Mexico.

Why does it always seem that the only solution to higher wages is to increase the cost of the good? How about this solution: pay the workers higher wages, keep prices flat, and take a lower profit.