If  arguments are not to seek purpose, then I'm not sure what purpose arguments have?   I'm also  a bit purplexed as to your desire to end the discussion as you still have much  to say, but alas,  I will simply end with a quick comment and then a question which does not require answering as its merely a tool for thought for anybody else reading this discussion.
Comment:  Compacts(aka contracts)  are to be enterpeted not by modern language, but by the language (words and the definitions of those words) at the time of the writing of the document.  If you find my old English References arcaic, well they were not when the Constitution was formed.  Those words still hold great meaning even today.  Just because within a living language we create new words, does not mean to reject the old.

Question:  If someone signed a 30 year mortage loan, would it be acceptable, legal or otherwise to allow the bank to change the terms of that loan without your concent before the 30 years had expired?