Wolf: I just read your post about why CY might not be required in the US, and I think you misunderstand R’ Moshe’s heter. He holds that government regulation creates an “anan sahadi” and that it is equivalent to a Jew witnessing the milking.
All:
Rav Moshe himself, who is the primary source of the heter, wrote in a later teshuvah (reprinted in Rav Binyomin Forst’s Hilchos Kashrus Hebrew edition) that since there is no longer a significant price difference, “tzrichim l’hasig”. Rav Moshe was not unaware of the price differential, just that it became less drastic as the years went on.