Just another handout. Ironically many of the recipients of said hand outs oppose social welfare programs.
I'm not saying I fully agree with the reasoning but I at least kind of get it.
it's not an efficient course if the target is fuel, but that's not the target. it is a decent use if we have lots of corn that nobody wants, which we do.
Plus, IIRC, ethanol is used as a way to make people think it is OK to use fossil fuels allowing the oil industry to point to these farms. Plus I heard too high an ethanol mixture can damage your engine, thus adding to "planned obsolescence".