If the process can be improved by the application of a little common sense and some ingenuity, productivity and cost will improve.
When you purchase products made in America, you give a silent, economic vote in favor of America's ingenuity, productivity, and economic future.
It overlooks what Marx pointed out, namely, that through human ingenuity, productivity is always increasing.
This share was to be in direct proportion to the diligence, ingenuity, productivity, and cooperation of each worker.
Hope this helps:)