This is your friendly reminder that jlgreco's is not a deductive argument and that most of the logic we base our everyday decisions on would be called logical fallacies. It's time for a Fallacy Fallacy, I think.
This is also your friendly reminder that jlgreco wasn't even employing "slippery slope" logic. He wasn't arguing that employing a cost comparison will lead inevitably to employing further cost comparisons. He simply pointed out that one cherry-picks the level that best makes one's argument.
This is your friendly reminder that your post makes no sense.