Siemens spends billions bribing government officials around the world. Its part of their sales and marketing plan.
Actually Siemens spends millions of dollars educating their workforce on ethical business behavior and practice. I've taken three mandatory on-line courses in the last year produced and paid for by Siemens. These are mandatory courses and employees must score 100% to meet Siemens requirements. As any large global enterprise, they have had problems in the past and it has cost them dearly. On the plus side, they have made major strides internally to educate their workforce on proper business practice. Siemens does not stand alone in the world with the type of problems you state. They have close to 500,000 employees world-wide, with 60,000 in the U.S. -- that's a lot of people to be responsible for their business behavior.