That's basically what we do now, but the trouble is cheap power sources with undesirable externalities win the energy market because consumers want more energy for less money.
Another trouble is the builder doesn't have to pay for the energy usage of the property, and there's no well-established way for the buyer to estimate consumption like there is with mpg.
Not really, but a letter grade is lacking a critical feature of mpg- anybody with a third-grade education can quickly estimate the exact gasoline costs of operating a prospective vehicle purchase. How do you translate a "B-" to dollars?
There are a lot of nutjobs running around saying they want Coal back, the President of the United States, for example, despite Coal being more expensive than Solar now.
So, to answer your question in earnest, Fossil Fuel Energy Companies and their bought-and-paid elected officials.
Those aren't people thst want less energy for more money, those are people that want to sell less energy for more money.
The people that want less energy for more (immediate) money are the people that want external costs priced into retail energy prices, but that's just because they don't want environmental damage to be treated as a non-cost.
