By your own criteria, no US manufacturers, this is a bad example. Why not use VCRs? No US manufacturers of those. Prices going up or down the last 5 years?
No. This proves the motives you deny, and the method of operation. The prerequisite of zero U.S. industry was not the criteria. Micron is too small to prevent the foreigners from having their way, and clearly would gladly go along with their gouging.
We only have the one small manufacturer...Micron Technology. But for that one, we wouldn't even have U.S. FTC jurisdiction to say anything about the price fixing that the foreigners can easily agree to amongst themselves. And once Micron is gone...well, they certainly seem inclined to do just this kind of thing, eh? Anyways, economic history is littered with this behavior. It is based on something you seem to have forgotten, called self-interest. Don't expect virtue when U.S. based competition can't enforce it.
Your whole creed has been to issue "philosophical" checks your wallet can't back up.