https://arstechnica.com/tech-policy/2019/12/driver-training-was-reportedly-too-much-of-a-bottleneck-for-amazon/

Amazon is rapidly dispensing with carriers such as FedEx for its retail deliveries, bringing the logistics business in-house to ship more Prime packages more quickly. The speed and money savings, though, seem to be coming at the cost of health and safety concerns—and a new report says the company is well aware, and Amazon is letting it happen anyway.