Sad to say. The only way this will stop is enough companies that use China ingredients that make people sick will have to be sued.
Names drawn across the news and lawsuits will at least make these companies cautious about buying from China. At the very least they may have them tested before use.
You are right. Lawsuits will cut into the increased profit from using imported substandard ingredients . It may be cheaper just to keep their stuff China free
It may be a couple years down the pipe, but the lawsuits from the tainted wheat gluten used in pet foods is going to send a really strong signal to companies sucking up to the ChiComms.
It's too bad simple patriotism didn't work, now a bunch of ambulance chasers are going to get rich...