It's not just corporate, it's human nature. Many people will steal your wallet if you leave it unattended. Some will steal it out of your own pocket and others will actually stab and kill you for it.
That's true in absolute numbers, because there's billions of people. But in percentage? Are we talking about 80% of the population, or is it closer to 1%?
If it's 1%, or close, then it isn't "human nature", it's an aberration. I believe that's the case. I also believe that corporations attract that kind of people in particular.