Aren't shoe companies notoriously scummy in regards to human rights? Nike has quite a lengthy controversies section on Wikipedia, and they're where a lot of his money came from.
Nike has some of the best labor policies of all the shoe companies now. Their controversies were in the 90s.
Yeah, you can choose between two worlds: in the current one, Nike is producing shoes in you don't want to really know circumstances and is paying LeBron ~$40M a year.
In another world, LeBron is still a millionaire, getting a nice $1M a year. The rest, a mere $39M, which in Paul Graham terms is just a couple months from turning into a billion, goes to the hopeless kids actually churning out the god damn shoes.
LeBron did nothing wrong. The system is this corrupt.