It's already this way. The only financial sense that can be made of an electric car is if you're a courier, rideshare, or taxi cab driver.
Full disclosure - I've had an electric car before, and liked it...well, the concept, anyways. I wasn't especially fond of the car itself, though if it wasn't for the poor combination of "green" wiring and living in a rural area, I'd probably still have it. But the electric driving experience was pretty neat, I did enjoy it, and I wouldn't at all be opposed to it again in the future for a commuting car. For a while, it was cheaper than driving my truck, and makes a lot of sense for those that live in the city with relatively short driving trips. There was also zero concern of super short trips, and the associated engine wear of frequent restarts.
But it all hinged on my ability to buy a cheap electric car, cheap electric rates at home to charge it, and gas prices going up. My suspicion is that once we become saturated with electric cars, the price of electricity to charge those cars will sky rocket, as will the price of gas in order to convince us all that electric cars are the way to go...so that we're all going to get screwed, whether we go electric cars or not.
A few years ago, I traded in my then daily driver - 2005 Dodge Ram 1500 Hemi that I owned free and clear, on a 2013 Chevy Volt PHEV - 3 years old, 30K miles, $13K (yeah, the value on these cars dropped like the Hindenburg...). The car had a 35-50 mile range on battery alone, (depending on terrain, AC/heater usage, how aggressive one with regeneration, etc), and averaged 35mpg when running on engine alone.
My daily commute was then 40-50 miles one way, and my employer had just installed a bank of electric car chargers in the employee parking lot that were free to use. The power company also offered a plan for super low electric rates at night for people with electric cars to charge them on the cheap. Ended up being something like $0.03/Kwh. I don't recall the exact numbers now, but I had figured out that the cost of the loan payment, plus the increased insurance premium along with what it cost me on my electric bill to account for charging the car at night, more or less equaled out to the same amount that I was spending in gas every month to feed that Hemi. So I was spending that money regardless - either going to the oil companies, or going to the bank. But this all hinged on buying a car that cost $13K, and could run the majority of my commute on battery alone. I ran the numbers before, and once overall cost of ownership is accounted for, it would be FAR cheaper to keep feeding gas to a 12MPG truck that I own than a brand new $25K Prius that got 50mpg. It would have been almost 15 years before I hit the break even point, assuming no major repairs were needed on either. But I suspected that even replacing an engine or trans on the truck would be cheaper than replacing similar parts on a Prius.
But eventually I'd come out ahead - either the price of gas would go up, tilting the scales in my favor, or eventually I'd pay the car off, and save the cost of the loan payment, and again, tilt the operational costs in my favor. But then, my employer started charging for use of the charging station, and it ended up costing more than just paying for the gas that would run the car for the trip home. Shortly after, the power company discontinued the special rate plan with the super cheap overnight electricity.
Wasn't long before running that electric car ended up costing me more than what it cost to drive the "gas guzzler" truck. Final nail in the coffin was rodents getting up into the engine bay, and chewing on the wiring that connected to the main control harness. $1,000 damage, overnight while parked in my driveway. Turns out that a LOT of these "green" and "environmentally friendly" cars use wiring with a soy based insulation. Basically vegetable oil based, rather than petroleum based, and it attracts the rodents like the Pied Piper. Toyota has had multiple class action lawsuits lodged against them because of this stuff. That tilted the scales WAY back in the favor of the gas cars, and these days I'm driving a Suzuki Grand Vitara as my daily.
