However, if needed because something may have been missed, the bolded portion from that quote indicates that there is a method for changing the constitution., And that's the Amendment process that is allowed for in the Constitution.
I hate to be the one to tell you this, but the part of my quotation from Federalist 34 that you put into bold type has zero to do with the amendment process. The statement has no relationship of any kind with what you interpreted it to mean.
If you had taken the time for a cursory glance at the context in Federalist 34, you would have understood that the entire statement is referring to taxation. The statement is answering objections, raised by those opposed to the Constitution, to the granting of a nearly unlimited power of taxation to the Federal government.
It's discussing taxation, not amendments. You missed the meaning entirely by assuming you knew what the words meant and then jumped to a conclusion.
Something was indeed missed, but putting it in bold type didn't prevent you from missing it. That something missing was the
context of the words you quoted, emphasized with bold type, and then interpreted with a completely different meaning from their original intent. It leads me to believe that perhaps you're not the one that should speak on behalf of all the founders and framers. After all, words have meaning.
To aid you in future discussion, I'll let you know now, that all of the Federalist essays from 30 thru 36 deal with the subject of taxation. And since you enjoy spinning the founders' writings on taxation into entirely different subjects, here is another that you can ponder from Federalist 36... "as far as there may be any real difficulty in the exercise of the power of internal taxation, it will impose a disposition to greater care in the choice and arrangement of the means; and must naturally tend to make it a fixed point of policy in the national administration to go as far as may be practicable in making the luxury of the rich tributary to the public treasury, in order to diminish the necessity of those impositions which might create dissatisfaction in the poorer and most numerous classes of the society. Happy it is when the interest which the government has in the preservation of its own power, coincides with a proper distribution of the public burdens, and tends to guard the least wealthy part of the community from oppression!"