That’s sort of an orthogonal idea in my mind. Yes, the Federal Government has a list of the types of things it is allowed to pursue. This is a separate idea fro

That’s sort of an orthogonal idea in my mind. Yes, the Federal Government has a list of the types of things it is allowed to pursue. This is a separate idea from the bill of rights, which essentially says “while the federal government is doing the things it is allowed to do, here are things they are not allowed to do in pursuing those actions”. So what you’re talking about it more relevant to the question “should the FBI be allowed to exist at all.” Is a federal bureau of investigation something that the federal government is allowed to make under the constitution, and if so what sorts of situations and crimes are they allowed to investigate? If you don’t believe the FBI should exist at all, then the sort of argument you’re giving makes sense. But what the rules as to the Federal Government’s allowed sphere’s of actions don’t say is how they are to go about pursuing those actions. (“To constitute Tribunals inferior to the supreme Court;” is a right of the federal government, but no mention is made of how those tribunals should be structured or how they should function.) So we get to the question of “If the FBI is allowed to exist, what sort of methods is it allowed to use to investigate.” And that’s where the bill of rights comes in, excluding certain types of actions. Or the general question could be stated “Is it disallowed for the federal government to purchase data about its citizens from private entities in pursuit of the rights it is granted by the constitution.”