My Guess: Next to The Dept. of Defense budget; the next biggest budget item includes the DOJ . You must remember that most of their employees are probably lawyers (liscensed attorneys). Many are looking to make a name for themself and to go either up the chain of command in the DOJ or make money when they leave otside the government.
Hint--attorneys make money defending folks as well as prosecuting them. In most cases MORE! It's all a system within a system, in case you did not know this.....
:monsters-