This is Kafka-esque theater of the absurd, suggesting that the more Big Brother is everywhere, the more Big Brother becomes legal. No way.
If the IRS believes that wrongdoing has been spotted, it should pursue it by getting a court order, persuading a court that they have cause and getting prior approval from the court. This is an area worthy of cooperation and common cause between the principled left and the principled right.
Lets say yes to the Constitution and no to Big Brother.