I'm pretty sure that it has been said before, but let me debunk some of this:
1) Who exactly will be starving without corn to eat?
Ethanol is made from sugar, in the case of corn from the fructose as in high-fructose corn syrup - yes, the nasty stuff that you want to avoid in a healthy diet. And there exactly lies my point.
High-fructose corn syrup has been, or is in the process of being, replaced with alternatives like Splenda or Stevia in things like candy, sweets and sodas. Because it's better for your health, and you know it.
Noone wants to take your sugar candy away of course, nor does anyone want to take away your corn on a cob. But all that land that has been used for the production of high-fructose corn syrup has to be used somehow: Like making Ethanol for cars, as an example.
Secondly, making Ethanol from sugar (or sugar containing things such as corn mash) is known as the "first-generation Ethanol production process". The second-generation process uses cellulose, which means that you can have your corn cob, but it will still be possible to turn the leave-y stuff and the stems around it into Ethanol. The third-generation process uses algae that turn CO2, air and water from the atmosphere into Ethanol. Personally, I don't think that this will take away your Nagi roll Sushi, either. And if it does, just eat California roll instead. And as you may know: Dino oil are compressed algae, then seasoned for millions of years. This takes the millions of years out of the equation.
2) Oil is a frickin' ending resource
Pennsylvania and Texas crude (as well as Brent and Saudi crude, for that matter) are getting less and less - do you really want to burn that stuff in your engine in the form of gasoline or diesel, or do you want to keep those 3K OCIs going?
Long story short: Make yourself accustomed to the idea that Ethanol content in gasoline, as well as Biodiesel will increase rather than decrease over time. And at some point (probably beyond our lifetime), even engine oil will be made from vegetable oil. Because dino oil doesn't grow on trees.
Lastly, but not leastly:
3) Does my car use 33% more Ethanol than gasoline?
Nope. Seriously.
It is true that in theory the energy content of Ethanol is 33% less than gasoline. But here's the kicker: Ethanol has an octane rating of >96.
For example, take a theoretical, naturally aspired 4-cylinder flex engine of 1.2L displacement with 16 valves, a compression ratio somewhere at 11:1 and 100HP on both gasoline and Ethanol.
The ignition system will tune itself according to the fuel in the tank, and if the engine would produce 100HP on gasoline, it would produce roughly 110HP on Ethanol.
But, like most production cars, it has the same 100HP rating on both fuels. Where did the 10HP go? The engine gets leaned down.
As you may know, leaning down an engine will increase the combustion temperature. But atomizing fuel cools the air-fuel mixture down, and as more volume of Ethanol is injected than gasoline, those effects will cancel each other and you can lean the engine down to it's original rating of 100HP.
That's why on a properly tuned flex vehicle with a naturally aspired engine the real-world difference between E5 and E85 is not ±33%, but ±10-15%. On a turbo-equipped engine, it may as well be ±1-5% (as an all-Ethanol engine would not have a compression ratio of 11:1, but something in the ball park of 14:1, which can be accomplished by higher boost pressure).
I know that the whole Ethanol thing is a little hard to comprehend, but I hope that you enjoyed reading this little write up. Ethanol as a fuel is definitively an interesting subject that should be approached with an open mind. Whatever makes this world the best of all places for our children, amirite?