It wasn't this way always (obv?). In the early 80s it was still acceptable for the entire engineering dept to get sloshed at lunch w/o any expectation of getting work done upon return. The salesdroid would sometimes accompany us. This was at a very large mostly defense contractor on the east coast of Florida.
I assumed that the culture changed at some point between the 1960s when it was normal for a corner office to have a full liquor bar in it (according to mad men) and the 2000s.