Perhaps I am a purist on these things. I hear the Liberals go on about Roosevelt's "saving" the nation through the expansion of the government, Great Society, the EPA, and Social Security and other clear Article 1, Section 8 violations. Their basic counter argument is that look at all the "good" coming from those things. And sure...maybe there are a few bits that are "good" like elderly people having some small income, or "clean water" and so on.
However, at that point of discussion, we have surrendered principle and are effectively arguing that Constitutional violations are ok if they are a net positive in the cost/benefit calculation.
OK, prove this is a violation of the Constitution.