There is also a psychological component because in a huge corporation decisions are often made not by a single person but by several people.
As with accidents, the more people have to make a decision, the more likely each one is to think that the others are as or even more responsible than they are. And if the others agree then it can't be so bad and what not. (with accidents it is so that people are less likely to help the more people are around because they think the others can help, not exactly the same but similar)

Counter to this one also has to remember that most really rich people have some kind of education that a lot of factory workers do not have. They can calculate financial deals or even get a good feeling for the numbers right away. They also know better about the consequences of what they are doing and so on. Blaming the poor guys for not having the same education is not fair if getting that education costs more per month than a poor guy earns in a year...