The Tenth Amendment is pretty clear: "The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people."

Now, I know, the Supreme Court has effectively gutted the Tenth Amendment, but the intent was that the Federal government was restricted to a specific set of activities, rather than allowed to do everything everyone thought was a good idea.

So if you think that the intent matters, then you see much of what the Federal government does as being a power grab of things that it never should have had the power to do - and which it still does not have the legitimate authority to do.