This question may appear to be straying OT, but it is a corollary to this thread. Given the rates of pitching for X amount of beer, and since yeast suppliers (Wyeast, White, Danstar, Safale) are presumably tailoring what they sell for 5 gallon batches, since sources of information like Mr. Malty state that very often this much yeast is inadequate, why don't the yeast producers either put more in a package or be more adamant in their recommendations that more be used?
NB: I am not questioning the science behind correct pitching rates, etc. I merely find this situation somewhat anomalous. And, yes, I understand perfectly well that one may just buy multiple units of a given yeast.