It's because Diebold is a corporation - and not an individual sentient human being - that they can get away without being charged as a criminal.

http://www.bradblog.com/?p=10323

If they were an actual person, they'd be in jail. Instead, because they aren't, and because they have a shit-ton of money to spend (on such things as say, fines), there is no real accountability for their "worldwide pattern of criminal conduct".