The cost issue is a red herring. Last season you had 12 judges, three of which were discarded and the remaing nine were used. If they gave up the fiction that the discard judges accomplished anything, they could have used all of nine judges and the costs to the competition would have been reduced by the cost of the three officials left home -- with no decrease in scoring judges.
Also, at Worlds this year, more money was spent entertaining OC, his guests and the Council than would have been spent on the judges that were cut. Apparently parties are more important than the quality of the scoring.