Voting Machines/Computers; why you don't want this in our voting systems.

Voting machine programmer comes forward and speaks to a court room to state "I was forced to program the machines to come out with the end result in favor of a particular party ( 51/49 ) no matter how the people voted." The judge asks "is there anyway someone would be able to trace this?" The programmer stated "no." 


The big picture....
No hard copies in turn leaves no evidence, there's no way to check to see if the voting machine/computers are even correct. Why would anyone use a voting machine?