If you're not poor, then it's immoral to work in such company.
If I had to choose between working for a monopolistic corporation or a mafia, I think I'd rather join the mafia because I can't stand hypocrisy. At least they're honest about what they're going to do to you if you don't pay them the protection money and they're not pretending to be the good guys. A mafia has a clear, well defined moral code with clear boundaries which limit the harm they do; also unlike corporate entities, the members of mafias take risks upon themselves.
If you're not poor, then it's immoral to work in such company.
If I had to choose between working for a monopolistic corporation or a mafia, I think I'd rather join the mafia because I can't stand hypocrisy. At least they're honest about what they're going to do to you if you don't pay them the protection money and they're not pretending to be the good guys. A mafia has a clear, well defined moral code with clear boundaries which limit the harm they do; also unlike corporate entities, the members of mafias take risks upon themselves.