The companies that distribute it are as much to blame. In china , they will continue to upgrade a product until their customer says its OK then starts to buy it. They do not make the best possible product , they make the product that just meets the customers demand. Nobody is buying drywall directly from china for their home. It goes through 1 or more middle men. If the middle men/distributers or resellers don't specify the quality sufficiently , they are to blame. The chinese make it to the importers satisfaction , not the end users.
Now in the case where fraud is involved , like with the milk , when the crap hits the fan , someones neck gets stretched in China. The chinese are not at all interested in making the best possible product regardless of cost. They make the cheapest product that meets the customers specifications. So if you are ordering from China , be careful that you specify every single thing you want. Don't assume they will know you meant something you didn't specify.
Also you need to be very clear in your language. If you say I want a cool looking bike , they will make you a bike that doesn't look so hot!
