Kane and Olivia didn't grow up in poverty. He lived in poverty as an adult. As for the rest, re-read my post about whether Callista had a choice at all... Also, don't forget that here we have a dystopia in a post-apocalyptic world, and it's a bit strange to me to see you complaining that Kane wasn't asked for consent or that the chances of Kane dying are greater than 0...
Everyone has a chance to die in this world, and as you know, only 3 characters are guaranteed not to die. And personally, I wouldn't want to play as Kane if he, like Olivia, was assigned to some important position like Warden right after the events started, where he would live quietly and peacefully. Where's the challenge then? The game would lose interest if Kane was invulnerable to failure (and even death). I think that's an obvious fact.
I am sure that in time the whole truth will be revealed to us, and then you and I with a clear head will be able to assess what happened and make appropriate decisions.