True, everything has it's risks but sometimes you have to take those risks for a better future. I understand the "but the Empire is so evil" argument and I would say... so? you have to think about yourself and your family. Every Government is evil, you have to think about what can you get out of it. Sometimes you have to be a little selfish, for example; if I need to feed my children and the best way to do it is joining the Empire, I would do it in a heartbeat. I don't think the Rebels pay well anyway ;-)
Family always comes first.