The Congress shall have Power - To make all Laws which shall be necessary and proper for carrying into Execution the FORGOING POWERS, and all other Powers vested by this Constitution in the Government of the United States, or in any Department or Officer thereof.

its not saying you can pass anything that is deemed necessary and proper, it is saying that if something is needed to protect or help carry out the 17 things the federal government is allowed to do, they can pass it. Why do politicians fail to understand this?