Moog used to be decent quality. Now? The company has been bought and sold so many times it's not funny.
Watch this for everything you need to know about Moog quality today:
https://www.youtube.com/watch?v=szEbSJ_Nnbw
Moog also has the problem of counterfeit parts - where it makes the situation even worse.
I wouldn't get too concerned with where the parts are made, but whether or not they were made to the correct specification.
My suggestion if you're looking for quality OE type parts - ACDelco Professional Series.