Are State Lotteries Honest?

Approximately two years ago, an employee of the Tennnessee State Lottery, admitted she programed the computer, so that double numbers would be in the pick 3 and pick 4 winning numbers. Tennessee use to have bingo balls drawn to arrive at the winning numbers, but decided to change to a computer-drawn system. i do not trust a computer-drawn form of lottery. it can be easily tampered with as shown above. are state lotteries really honest? are the employees given polygraphs to prove their honesty? does anyone know?