I think Bob Crosby's point about the limited amount of bunkers ANGC was designed with is not that economic considerations had nothing whatsoever to do with the evolving philosophies of a number of these architects such as Jones, Behr, Hunter, Thomas etc, just that economic considerations may not have been the only reason for their evolving philosophies about bunkers and such.
Too many on here seem to look at every issue and every subject as being all black or all white or ALL just one thing (like economic considerations only) or ALL some other thing (that had nothing to do with economics). I think a reasonable and logical golf architecture analyst will see that some of these evolving architectural philosophies were done for a number of evolving reasons and not just one single reason such as economic considerations.
Furthermore, all those architects throughout their careers understood that their various clients wanted perhaps some quite different things and consequently none of those architects ever tried to lay some completely standardized design type or style on any of them.
This is certainly the way William Flynn saw it and he explained it very clearly in some articles he wrote for the USGA Bulletin in the late 1920s. And more specifically interesting to this particular thread is he explained it very much in the context of bunkers and bunker arrangements!
All most of us have to do is simply read what these men actually wrote and appreciate it for what they said. It seems to me the danger that arises on here with understanding is when some of the participants on here just automatically assume they were being dishonest, acting the part of a hypocrite or selling out their architectural principles without admitting it!
Have you ever noticed that almost anything and everything Tom MacWood says or implies on this website has always had to do with the fact that some club or some architect or some historian or analyst was not telling the truth somehow and for some reason?
I sure have. I don't mean that as any kind of personal criticism either; it just seems like it has become a fact.