The law says that after 4 hours of work employees must get a minimum 30 minute break for lunch away from their work station (not riding in the truck).
To not do this would get you in trouble as much as not making them wear mandated safety equipment.
Some of the biggest offenders of workers rights I've seen were Hispanic crew leaders. Those guys can be harsh! Not to mention illegal.
Back in the day when I ran crews I bought their lunch and paid them to eat it. I left the ole payroll clock running right thru lunch. Their production was impressive.
I led by example. They worked their butts off trying to keep up with the old man.
"THE BEATINGS WILL CONTINUE UNTILL MORALE IMPROVES!"