One thought that is consistently on the back of my mind throughout this conversation, El Mach, is that literally anyone can be happy.
Yes. But, unless happiness is completely unpredictable, we can still look at other factors.
There is no doubt that human development indicators are useful, and that raising them is a good thing.
Why? If they're happier than you are, then why in gods green earth would we want to make them more like you? Seems like a horrible thing to do. At least, it's a hell of a risk. If 3rd world people are happier than 1st world people, then what's the point about giving a crap?
1) Are parents with the means to move country (say) obliged to do so if it means a material increase in their children's developmental indicators?
I don't think so. Only if there's good reason to believe that the children will end up perceiving that their lives were above average as a result.
2) Where does happiness fit in to all of this? 3rd world children are just as happy as 1st world ones. In many cases, even more so. How do you judge that?
I think it's paramount. What's the point of forcing someone into existence if they're not happy that they were? For your own pleasure?
I don't even know what makes me happy! What can your framework actually prescribe for me?
I've allowed the ideas to intersect, but 'happy they were born' and 'general happiness' aren't completely the same thing. You quickly spiral into hypotheticals regarding opiates. What do I prescribe? Well, if you think it's likely your kids will end up not being happy they were born, maybe don't have kids? It's not hard, but I find the idea of creating little unhappy beings for your own personal pleasure kinda disgusting.
What you have to remember is that not everyone is like you. Not everyone is 'happy they were born'. An incredible number of people aren't, and have been basically coddling suicidal thoughts for a significant portion of their teenage years onwards. What was the value in creating them in the first place? They didn't benefit. The ones creating them might have, as long as these victims can put on a shiny happy face and fake it, or if the creators are sociopathic enough to not care about the misery they created. Now, we can ignore their existence, but that just requires a lack of empathy and insight.
Now, my belief is that there's a stronger genetic component than we realize, but I think there are exogenous factors to people's happiness. And yeah, some of those are with regards to material wealth.