The parable of the good crow.

There once was a farmer who grew crops to feed the people in his area. He supplied food at a reasonable cost. Okay, he did heavily discount his wine to attract customers and the wine growers lived wretched lives, but at least they could get pissed and drown their sorrows. One day a wicked wine grower sent crows to destroy his crops. When the farmer saw the crows coming, he rushed to get his servants, but they'd all gone on a servants' picnic and there was no one to stop the crows eating all the crops. Then a mysterious crow turned up and told the crows not to eat this particular crops. The mysterious crow told the other crows about a vinyard that had delicious grapes and they all flew away to feast on some pisshead wine grower's grapes.

The farmer thanked the mysterious crow and asked him why he had helped. The mysterious crow removed his crow head and the farmer could see that he was in fact his most loyal servant dressed up. He'd missed the servants' picnic to help his master. The farmer rewarded him with a little bird seed he'd once been given.

This parable tells of how wine growers can be very evil and this is why modern supermarkets sell their wine cheaply. The good crow represents people who happily use their One Card to get extra discounts and are prepared to chase crows away from supermarkets.