The Founders didn't happen to agree with you, including the guy who wrote most of the Constitution.

“If Congress can apply money indefinitely to the general welfare, and are the sole and supreme judges of the general welfare, they may take the care of religion into their own hands; they may establish teachers in every State, county, and parish, and pay them out of the public Treasury; they may take into their own hands the education of children, establishing in like manner schools throughout the Union; they may undertake the regulation of all roads other than post roads.  In short, every thing, from the highest object of State legislation, down to the most minute object of police, would be thrown under the power of Congress; for every object I have mentioned would admit the application of money, and might be called, if Congress pleased, provisions for the general welfare.”

James Madison, on the House floor during debates on a Cod Fishery bill [February 1792]