>>To the extent that the lack of choice derives from circumstances that a person didn't choose as an adult, that is unfair. It might be inevitable, but its unfair.
Again, its not. Unless you are stuck in a war zone or in some remote corner of Africa.
Most people in developed and developing nations today have the freedom to make decisions that decide how they are going live their lives. For centuries we've fought and asked for these rights, Now we have them. The fact is most people have fewer reasons to blame for their failures these days. Sooner or later you have to face the fact, you are what you are because of your decisions.
Even the person who works 16 hours at a factory has a choice. It might be a difficult choice, but the person still has some remote chance. The question is do you want to the same work another 15 years from now, or can you do something in your spare time and change that.
There are always going to be some people in that factory who won't be doing the same job 15 years from now, and there are always going to be people who will the same job 15 years from now.