After all, why is it a bad thing that police are more efficient at catching criminals Generalizing a bit, the people most likely to make that particular argume

After all, why is it a bad thing that police are more efficient at catching criminals Generalizing a bit, the people most likely to make that particular argument are in my experience also the people most likely to respond to "three felonies a day" type arguments. I don't know why, but the strongest law-and-order folks tend to also be the strongest anti-"big government" folks. So framing parallel construction as a method to enable selective prosecution of anyone (see: "three felonies a day", given unlimited warrantless surveillance, you can Richelieu anybody you like) at any time -- with all the threat that implies of being used to expand government power without limit and intimidate, silence or outright imprison detractors -- is probably a more successful approach.