Very surprised the truckers weren't outfitted with additional gear. I would have thought that trucks with sleepers would have a ton of stuff back there, just in case...
Stuff costs money. Companies barely pay their drivers. Why would they invest in gear for drivers?
They probably also figure it would get stolen or 'lost.' (and some would)
And the drivers barely make any money so they don't have spare cash to invest in helping keep the company's commitments.
There might be exceptions to this adversarial relationship but my wide reading and 100% turnover figures in the industry suggests it's normal.