"A job worth doing, is worth doing well." Doing my job (or anything else) to the best of my ability, so that I can advance with credibility and support my family is vital to me. An honest work ethic is crucial.
If my ethics are for sale then I risk losing everything that I have worked hard for. If I were to deceive others for my personal gain, sooner or later, someone will eventualy catch on that they have been decieved and it would be difficult to earn their trust back. And I would feel crappy!
Later on I must be able to look back at my life choices and know that my actions have been dignified and honest. I must be able to look the people that I've interacted with in the eye and know that I've dealt with them fairly. Fortunately I have not been in a situation where I was seriously tempted to compromise my values....and I hope I never am. However, no one is completely immune. Temptation and greed are a fact of life. As for today.... I can't be bought.