The point of moving regulation to the states is to foment competition amongst said states - this should exert downward pressure on corruption, but how much we don't really know. Certainly we currently have some states which are more corrupt than others. Which would certainly be an improvement on the status quo.
Copyright is certainly a popular issue here on HN, and I'm sure K Street makes a lot of money on it, but again it's like the EPA - something which the government has to by definition regulate in some way.
In fact, moving Social Security and Obamacare subsidies to the states would probably put a larger dent in K Street than all of the other issues you've mentioned combined (military, EPA, copyright, antitrust). You're talking about trillions in handouts, issues which impact every single citizen, massive bureaucracies fighting for power.