The argument wasn't that drugs were the only area in which organized crime operates; it was that it is by far the biggest one (although I have even harder time

The argument wasn't that drugs were the only area in which organized crime operates; it was that it is by far the biggest one (although I have even harder time considering prostitution to be a crime). But, other things are criminal already, and just because an ability to monitor financial transactions makes some forms of crime more difficult, does not by itself make it a good idea. Surely if domestic law enforcement had the same powers that NSA has would make a lot of crime harder, and allow police to catch thousands of real criminals -- but, would it be a good idea?