I have several co-workers who started working at Monsanto with the idea that of course, they with their brilliant research were going to make crops that could be grown in deserts, on the Moon, etc. and they would end world hunger. Best of intentions. When they quit a few years later, they were willing to take any job--pumping gas, flipping burgers, PhD be darned, rather than work at Monsanto. They tell stories much much worse than this. Monsanto doesn't just hate their customers, they hate their own workers, and have replaced much of R&D with lawyers. Sure, you find disgruntled people in every industry and every job, but Monsanto seems to have a special knack for making people very bitter and cynical at an astounding rate.
Seriously, I would advise anyone interested in the biotech field to go to any other employer. There are plenty of good ones out there. If it came down to feeding my family, and I had a choice between Monsanto and scrubbing toilets, the toilets would probably win out. That's how bad the horror stories are.