All explained in the Daily Mash:
"We're planting crops for fuel instead of food in order to make it cheaper to drive to the shops where we then buy food that is much more expensive because we've planted crops for fuel instead of food."(...) "Meanwhile, the banks are borrowing money from taxpayers so that they can then lend the same money back to the taxpayers at a higher rate of interest than they borrowed it from them in the first place."
It is so funnily true that it is sad.