It's true, but it's also true that many things that are considered corruption/illegal when you do it for the government, they are not when it's inside a company. If a business owner hires his nephew, that's not illegal and many people wouldn't consider it corruption. If a government official appoints his nephew, that's frowned upon to say the least. But going back to your argument, if an employee uses his position and gets bribed, of course that's going at the detriment of the company... but you could also say that if the company has the right checks and balances he will get caught, and that if the company had made sure that the interests of the employee were well-aligned with the company's it wouldn't be a logical step. And that's why some companies pay so handsomely.