I believe it partly comes from this, which is for non-supervisory positions across the board (including truckers): https://www.bls.gov/iag/tgs/iag493.htm#earnin

I believe it partly comes from this, which is for non-supervisory positions across the board (including truckers): https://www.bls.gov/iag/tgs/iag493.htm#earnings https://www.bls.gov/iag/tgs/iag493.htm#earnings However, if you look at the table below that, even when you differentiate to more specific occupation, median (and certainly mean) wages are above $15. Perhaps there's a further differentiation to "hand laborers and materials movers" that brings this number down further, per the other BLS link in this thread. I'd be curious about regional differences though, e.g. in Bessemer https://www.nytimes.com/2021/03/18/business/economy/amazon-wages-alabama-union.html https://www.nytimes.com/2021/03/18/business/economy/amazon-w...