It's cultural. There's a serious adherence to the phrase let the buyer beware, however it's almost impossible to solve locally because if you acknowledge a problem you're apparently responsible for fixing it or you can be disappeared if it makes the country look bad. China is a very unique country with interesting sets of values. The whole global recycling chain got upended because a movie in China showed how nasty and harmful the recycling process is for low end plastics and metals which embarrassed the country. I remember there was an official who got in trouble for smiling at an inappropriate time. Almost everything is about appearance, much like the US early in it's ascendancy. China will eventually change when it's in their best interest to protect other people, it's not as if the US doesn't do very similar things to some of it's allies. Just look at the chicken tax or Canadian business suits for example. It's just in our best interest to enforce IP law currently because we own some of the most valuable IP. We over protect a ton of it too. That's nothing compared to our blatantly excessive copyright laws. Simply put it massive rent seeking behavior on the part of the US. As far as devaluing their currency, it's one of the few cards they have to play but it will hurt them in the long run as it means their foreign investments will lose value unless it's in real estate.