Why is the 10th amendment invisible here?
The "foregoing powers" and "all other powers" listed in that clause are the ones listed in Article 1, Section 8. Note that the clause says "Powers vested by this Constitution in the Government of the United States." It doesn't say ALL powers. The federal government doesn't have other powers just because they SAY they have them. They must be stated in the Constitution. Any that are NOT stated fall to the states, just like the 10th amendment says.
Some people are reading clause 18 as if it confers limitless power on the federal government. If that is the case, why do we even HAVE a Constitution???
Let’s break it down yo!
Since Hamilton was brought up….we’ll just use him again;
He explains their thought process behind Necessary and Proper
“necessary often means no more than needful, requisite, incidental, useful, or conductive to. It is a common mode of expression to say, that it is necessary for a government or a person to do this or that thing, when nothing more is intended or understood, than that the interests of the government or person require, or will be promoted, by the doing of this or that thing.”
Next, he explains the intent.
“The whole turn of the clause containing it indicates, that it was the intent of the convention, by that clause to give a liberal latitude to the exercise of the specified powers. The expressions have peculiar comprehensiveness. They are, "to make all laws, necessary and proper for carrying into execution the foregoing powers and all other powers vested by the constitution in the government of the United States, or in any department or officer thereof."
Then, he explains how silly it is to take an absolutist take on the clause
“To understand the word as the Secretary of State does, would be to depart from its obvious and popular sense, and to give it a restrictive operation; an idea never before entertained. It would be to give it the same force as if the word absolutely or indispensably had been prefixed to it.”
Lastly, he points out that to take such a stance, nobody would get anything done!
“Such a construction would beget endless uncertainty and embarrassment. The cases must be palpable and extreme in which it could be pronounced with certainty that a measure was absolutely necessary, or one without which the exercise of a given power would be nugatory. There are few measures of any government, which would stand so severe a test. To insist upon it, would be to make the criterion of the exercise of any implied power a case of extreme necessity; which is rather a rule to justify the overleaping of the bounds of constitutional authority, than to govern the ordinary exercise of it.”
They never intended for the constitution to get in the way of usual and customary operations of the .gov