What are you talking about? Since I personally have been at the Optimum Whey plant outside Chicago, and have seen the process, including how they make it from start to finish, confused on your statement here. Seen the raw materials, the mixing machines, the process and more. They manufacture in the USA, as do quite a few others (via other manufacturing facilities around).
As for certain raw ingredients, that is true, companies outsource those from all over. You would be surprised how many different types there are around.