IMHO - The airlines are shooting themselves in the foot with this kind of pricing. First it just pisses people off to be treated like suckers and idiots. Second, you get enough of this kind of idiocy, and it changes your travel philosophy. You get people resigned to flying in Y, or not traveling, or traveling somewhere else, or traveling on another carrier with more transparent pricing.
And BTW - corporate travel policies that allow this kind of irresponsible pricing are mostly to blame. If I were a shareholder and found out someone was buying a $17k air ticket on a commercial carrier, I'd have them fired.... regardless of the circumstances.