As said you can't blame it all on corperate greed. Companies A and b both make sprockets, Company B starts doing their manufacturing overseas. All the consumers want is cheap and company starts losing market share to comoany B. To survive Company start manfacturing overseas also. Now you have two issues to deal with you have to have somebody willing to invest in rebuilding those factories here. However the bigger issue is the consumer using the price as the only factor in there purchase rather than price and quality.