The problem with this line of thought is that large criminal enterprises have political goals, and sufficiently large governments have criminal elements with criminal goals within 'em.
who's more likely to work at the NSA? A man who respects the constitution or a criminal? as the NSA grows in both size and power the answer will become clear. As an nsa employee you'll quit or expose secrets when things get sketchy. the only people stick around will be... what exactly?