I will quote from one of the books I have in my possession:
"The ultimate means of political control by all totalitarian states is to have most members of society under surveillance and in a state of illegality. Everyone is vulnerable to the bureaucracy that holds this power. In Nazi Germany and Soviet Russia it was the security police (the Gestapo, NKVD, and KGB); in the high-tax West every country has a special branch of tax police: offices of " Special Investigations," the "Intelligence Division," and "Fiscal Police." In every tax audit, the possibility of criminal prosecution is held over the head of every taxpayer......"