Altering components to something cheaper is common practice for every company that is willing to exploit the fuck out of their customers. Look at the food industry. In EU there is control, in US thare are sanctions. But it is up to the governments because companies are to opportunistic to change. As long you can (re)sell the junk you get, you're fine, if you can't you upgrade "QA".
Both the EU and US have internal controls on food quality and sanctions.
Contrary to the impression your post gives, the EU has much more "sanctions" against food (esp. imports) than the US does, and is generally taxing much heavier and restricting many more things. Importing essentially any milk product into the EU is only possible on an exception basis. Trump has a LOT more work before extra sanctions in the US will become comparable to the EU ones.
What is often not said is that the EU not only has sanctions on its borders against food products, it actually has internal sanctions and regulations that are purely political in nature.
For example "champagne" in the EU can only be made within a particular region in France. Which leads to funny, in a sad way, consequences:
For your other part of your comment, I am unwilling to give a real answer. Obviously the US checks it's food quality. It's made different choices than the EU, famously the US allows hormone "enhanced" meat, but it does check food quality and safety. There are heavy penalties for breaking them.
Champagne is literally the name of the area where the product comes from. It makes perfect sense that anything that doesn't come from the region Champagne, isn't champagne... Call it sparkling wine, it's fine, but not champagne. And it applies to most local products. Camembert? Comes from a specific town, which is called Camembert. Beaujolais? The name of the province. And the list goes on. It doesn't sound "absolutely ridiculous" to me.
Did you look at the map? It's nearly all things with a place name in the product name. For example, "Welsh Beef". Why is it reasonable for a consumer to buy Welsh Beef and for it to possibly have come from somewhere other than Wales?
It seems to me, more like generalising the concept of trademarks to place names rather than just company names and brand name.
