Ahaha.....I actually enjoy the fact that you found the pie analogy simplistic....it is VERY simplistic, but it is something people are familiar with, so I am accustomed to using it to explain things
I think that the ultimate lie that the "green" crowd as well as the "big-timer bankers" tell is that alternative energies will be capable of even close to the amount of cheap energy that we currently get from fossil fuels. In the more well-known ways, such as solar and wind, they do not become "energy positive" for 5-7 years. Even with this, the amps you get from it are very low as compared to something like propane or coal.....I know this well, as I live off solar and water power alone.
There is always the retort that we will magically invent ways to increase the amps we get from these technologies, but this is also an area of diminishing returns. These are NOT new techniques, and for as much as they have gotten cheaper, easier to make, they have only marginally increased output....the same goes for wind, long-life batteries, etc.
To add to this, all of these technologies, such as solar and battery technology, require a large amount of rare earth metals which we do not have an indefinite supply of. There is no rare earths mining in the entire US, and China has been mobilizing to take control of these resources for 3 decades. Things like lithium, or the hundreds of rare earths needed to make the alloys we use for so much of our technology, are not indefinite or even close.
There has been, and will not be, any effort to institute a "cradle to cradle" system to conserve any of these and stop the dead-end they are made with now. The same is true for oil, where they is not, and will not be, any worldwide effort to stop the demand curve for petrol that is easy to google and will blow your mind.
Almost everything the modern "western" model does is 100% reliant on this cheap energy. Food is grown and moved by it. All industrial practices now rely on it....and it will be getting a LOT more expensive. I am not an alarmist that is saying we will "run out"....one can technically make gasoline from shale oil or from a field of sugar cane....but these are many orders of magnitude more expensive, both in land and money, than the light/sweet crude we have grown the country on.
For an example of what will be coming, look into the Cantarell oil field in Mexico. In short, it has collapsed...and it is added to about 70% of the major oil fields, or "elephants", that are in KNOWN decline. In some others, such as Gawaar in Saudi, it is a tightly held state secret of the amounts of oil they have left. Many experts feel that Gawaar is also in decline.
Everything reliant on this system will become, slowly, more and more expensive....and nothing will be coming along any time soon to change this. It will lead to further stratification of society, as only the select few will be able to afford the lifestyle that this all affords. This is all 10-20 years away, but it is happening.
The only solution is the loss of the "Wetiko" mind-set. Otherwise it will all be like that Beatles video of the monster that consumes everything, before consuming itself. It is not if, but how long it will take.
Great resources on this include: "The Last Hours of Ancient Sunlight" by Thom Hartmann, and "The Race for What's Left" by Klare.
"They now look to a single and splendid government of an aristocracy, founded on banking institutions, and moneyed incorporations under the guise and cloak of their favored branches of manufactures, commerce and navigation, riding and ruling over the plundered ploughman and beggared yeomanry." - Thomas Jefferson, 1826