I don't really know what to tell you, but thanks for replying :)
I'd love to say something like: "Well, see, that's the problem. If EVERYONE wouldn't follow that logic of >>someone else is going to do it if I don't<<, the world would be a better place." Except you are right. Someone else is going to do it. In fact, the majority of people is probably not going to see anything wrong with lobbying for Monsanto - and even if they do, they'll comfort themselves with their paycheck, thank you very much.
Question is, are you that pragmatic? From experience, people who actively question the conditions they're living in, and especially people who possess the kind of sensitivity that makes them open to depression, are not terribly good at doing the wrong thing for the right price. I know I can't do it, and as I said, I tried.
But maybe you can, or maybe (and most likely) you'll find a lesser evil that you'll be okay with. I don't think there's anything wrong with it either way.