I think you drastically underestimate the value of work as it related to self actualization, determination and long term success as an adult.
Fortunately, we have a bit of an A/B test going on in America right now - rural youth in many parts of the country have no meaningful work and no home-economic structure into which to pour their energy and time. News headlines lead me to believe this is going poorly:
https://www.nytimes.com/2017/01/06/us/opioid-crisis-epidemic...
You talked about the mine owners and the price of phones, but what about the children and their families? What would they have to do?
If there's no schools then there's not enough tax being drawn from the mine, so tax the mine (or cobalt exports). You do that until the point smartphones become unaffordable (which we are really, really far off).
Except that's not what happens because it's not in the West's interest and there's enough influence over dictators etc. to keep it that way.
What's your point, unless you were actually agreeing with the parent?
If only there were an alternative to this inevitable, natural, inexorable economic process. Too bad there isn't.
If you want to try to solve the problem through some random intervention you need to take a step back and fix whatever is preventing them from going to school, not arbitrarily taking away their jobs and then patting yourself on the back for a problem solved.
The ultimate reason it doesn't happen is because people in the west don't want to pay more for their smartphone (they are not to blame though, as they won't see this picture, our politicians, corporations and planners are the groups that maintain this picture deliberately).
> Should working children on farms in Iowa be banned? Had it happened when I was young, half the family farms would have gone under.
probably yes. If you can't support a business without relying on child labour, it's not much of a business. I'm guessing this was around 20-40 years ago, during which time food production boomed across america and food prices plummeted. So yes, the food would have been produced regardless, you and your peers would have had more time to spend on education and the net personal and economic benefits would have been positive.
If you took the children out of the mines the cobalt would still get mined. The owners would find technology and process efficiencies to stay price competitive, if those don't exist then the price of mobile phones should go up.
These parents are no different to those in developed countries and would want what's best for their children, if they had the choice - so that safety net would get added.