The government didn't have to make hay expensive, in the late 1800s, an estimated half the agricultural production of the US was dedicated to the production of feed & fodder for horses, for work & transportation. As the population increased it was obvious the need for animal feed would outstrip food production.
As for electricity production for transportation, you should talk about things you obviously don't know anything about it. The average light passenger vehicle, passenger cars & light trucks average about 14,000 miles per year. Everything I've seen indicates a mileage of about 4 miles per kWh or 3500 kWh per year. Given that we have an energy production/ consumption monitoring system for our solar electric system, I can make a good estimate of the energy required for EV and the system production, it's very close to that, 3744 kWh per year, my wife drives a lot.
It turns out to be just about 1/3 of our solar energy production per year. Our system is bigger than average because some of our production goes to operating the farm but it's not a large system by any means. The average rooftop solar system can easily provide the energy needed to supply the average light passenger vehicle.
If you paired an average rooftop system (or equivalent free-standing system) with every EV there wouldn't be any problem with production capacity. It would require $8-9 thousand initial investment (before any subsidies) but would operate for a minimum to 25 years, more like 50 years. It would just be part of the cost of the house.
14,000 miles for 35 years equals 490,000 miles or 1.6 cents per mile.
