The necessary and proper clause is one of the most abused provisions in the Constitution.
Alexander Hamilton used it to justify the charter of a national bank. But Thomas Jefferson had a pretty simple and compelling argument. The word “necessary” means what it says. I think Jefferson wins this argument.
For Further Reading
Does the Necessary and Proper Clause Grant “Broad Authority” to Congress? Actually, None at All
Necessary and Proper, Not Anything and Everything
A Colonial Pamphlet Helps Show Why the Constitution’s Necessary and Proper Clause Granted No Power