I think the point is that this kind of thing makes you realize that your "job" is not all that bad and suddenly you are more happy.
Of course I think that even some people working in that mine under these horrible conditions are happier than many of the people in the western world. After all tough physical labour is better for the human psyche when sitting home unemployed and feeling completely depressed and useless.
Your first point is irrational, as far as I'm concerned.
What you want from your job and what you're getting from it, shouldn't be related to what happens to other people in other countries. Millions of people around the globe are suffering each and every day - because they don't have what they need. But that doesn't make your situation any better.
I think a job should be about what you want, not what you think you should have compared to others. Then again, that's not what our world society is about - as it has little or nothing to do with the needs of the individual or the good of the many. People don't really think for themselves, they just accept what they have when they sense it's ok compared to what others have - and compared to the perceived social standard.
As for your second point, I agree. They might not even know what they could have or what they could do to have a longer life. They're just surviving when others likely are not.
That's kinda my point about the obsession with wealth as a status symbol. Apparently, it's fair that Johnny Depp gets paid 55$ million - because the movie profits a lot from his being there. But why are we using our resources on this earth on things like that? Why are we making blockbuster movies when we could be using the resources for something that actually matters?
I'm not pretending that I'm not part of it, because I am. It's a matter of being conditioned - and though I fight it as much as I can, I'm actively contributing to it by paying for entertainment - making the rich richer, so they can waste our resources some more. People think that by paying for entertainment - they're somehow contributing to something worthwhile - but all they're doing is contributing to a world where a few laughs are more important than the survival of human beings.
But it's just a tiny factor in a very large structure that's entirely broken. We don't do anything by changing just this one thing - because people in power in the countries in question will just take control of whatever resources would be distributed in their respective areas.
I just think it's profoundly sad that people don't understand the insanity of paying individuals so much money. Not that I give a shit how much they make, if only there was enough to keep everyone alive and healthy - but there isn't when so few have so much.