Also if you have 110 at said work site you could plug in and charge while you're sitting there.
That doesn't scale well. If half or more of the cars in a parking lot need to charge at work, either parking lots are rebuilt with electrical outlets everywhere, or there is a mess of extension cords. (works great in the rain or snowy mushy they have up North except for that snow plow part).
Also, who pays for all this electricity? A couple of hundred cars every day can add up.
... Every work site I've visited or driven by had people working on it not sitting on their asses. Those who were sitting were doing so in a trailer, not their trucks.
As for who would pay, the same guys who are paying for the electric already, the site owners.