I happen to agree with both sides of this debate. I dont think that employers need to provide FREE electricity, but I also believe that some will to attract talent, and that many employers will build out FOR PAY charging.
People in california (and specifically the bay area) have a skewed view of this, in my opinion. People in Texas who pay somewhere between 8 cents and 15 cents a kWh likely dont quite understand "what the big deal" is around cost of charging, while the typical california cost per kWh is between off peak of 16 cents a kWh to on peak over 50 cents a kWh.
I happen to work for a company those up in the bay area would be familiar with (the one with the big blue buses, busing their employees to work) which is one of the leaders in our particular field. I dont work in San Fran, but in southern california, and the location I work at has EV charging, but its not free. The parking spaces are also (at my location in southern california) NOT "primo" ones right up front, they are at a back building down the street, so less convenient.
The cost to charge is roughly what someone would pay to charge at home, so the stations are usually utilized by those who have to drive somewhere else once they get to work, or have a long commute, or, drive shorter range EVs.
I think we will see the continued build of free charging at places that have incentives to keep you there or lure you there (shopping centers, restaurants etc). I also think that workplaces will eventually stop offering charging "for free", if for no other reason because then they wont have to contend with designing programs around making people move their cars.
Highly desirable employers who are attemping to attract specialized talent, might either continue to offer it "for free" or even give certain employees cards to unlock charging on the company (similar to company gas cards).
I feel that pay charging at work will expand, but "for free" charging at work is unsustainable at scale, but will be offered to "some". We will have more charging infrastructure, but everyone wont be charging for free at work, even at high end employers.
If the stations were free at my specific location, for example, you likely wouldnt be able to get one. When the company had a lunch N learn session to tell us we were getting EV chargers a couple years ago, there were like 150 people there, and my site has about 600 people. The second they said " for cost" you could feel the palpable air go out of the room. If they were free, probably half our employees would have bought EVs and tried to plug into the 10 stations they installed.
Because its for cost (reasonable but there is a cost), they are generally available.
I think "corporate" in SSF has free charging on campus, though.