I loath the term slave labor.
In China the average worker makes $2 per hour.
Low by our standards but you can rent a 2 bedroom , 1.5 bathroom apart,net for $28 a month.
Comparing our wages to others wages makes zero sense unless you take into consideration their cost of living.
Personally, I don’t want to pay $700 for my next iPhone.
The cost of labor per iPhone is $35.00 per phone. Labor is barely a factor. if made it the USA the per phone cost increase would be hardly noticeable.