I guess the question is: Did the writing of a Constitution achieve the list of tasks. Or, did it require much more. One could argue that in addition to the Constitution a massive government infrastructure was required to implement the list of tasks. On the other side of the argument, one could say that the Constitution was actually the instruction booklet for the formation of that massive government infrastructure that carried out those processes and achieved those goals, that the government is simply the continuation of the Constitution.

I'm not a politician or a philosopher. But if the Constitution isn't clear, maybe you need a new one. For example, the document doesn't explicitly state what its intent is. You could start there. But somehow I doubt America will rewrite its constitution.