Capitalism is about providing value to consumers at lowest possible prices, not about maximizing some abstract (i.e. non-monetary) efficiency. If destitute work

Capitalism is about providing value to consumers at lowest possible prices, not about maximizing some abstract (i.e. non-monetary) efficiency. If destitute workers are cheaper than robo arms, then the company will obviously have no reason to invest into those arms, and will exactly grow the business via "just getting more slaves" - see Foxconn and other similar empires.