The primary argument in my mind is that the US has known standards for labor conditions. While they may not always be perfectly adhered to, the assumption is t

The primary argument in my mind is that the US has known standards for labor conditions. While they may not always be perfectly adhered to, the assumption is that labor standards (wherever set) are not adhered to worldwide. Therefore, the higher initial standard in the US (and other developed countries) leads to a better working conditions for that product.