And cost, it will. Is a little marketing perk ("We're fighting global warming, buy our stuff") worth losing 15% of your customer base when they leave the country?
Weeellll, regulated utilities make a profit margin on cost. Cost goes up and the margin goes up. Years ago there was a gas plant across the road from a gas plant owned by my employer, a large company.
The plant across the road was painted nicely, had new vehicles parked in front, newly constructed and maintained fence, flowers and lots of other perks. This was in sharp contrast to the plant of my employer.
The difference? The one across the street was owned by a regulated utility, they made money by spending money. We made money by working money.