Or that people are using 900$ phones to explain that those children should be happy to have a 1p/day job.
Free market surely doesn't apply to starving 7 years old. What are the alternative they know about? Who brought them to the mine? What the difference between that and slavery? Is slavery allowed because "they could end up as prostitute"?
As Congo owns a big proportion of Cobalt they should be able to hire "adults" to do the work and pay them more. Given they have any incentive to do so, which they currently don't.