Shari’a, Banking and Revolution

[livingdead]

Barter system is better option....

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‘Uncertified’ managers of Anna Hazare’s village give management lessons | PaGaLGuY.com - India's biggest website for MBA in India, International MBA, CAT, XAT, SNAP, MAT
In 1980, the Grain Bank was started by him at the temple, with the objective of providing food security to needful farmers during times of drought or crop failure. Rich farmers, or those with surplus grain production, could donate a quintal to the bank. In times of need, farmers could borrow the grain, but they had to return the same amount of grain they borrowed, plus an additional quintal as an interest. This ensured that nobody in the village ever went hungry or had to borrow money to buy grain. This also prevented distress sales of grain at lower prices at harvest time

How is it worse than selling your grain and keeping money in bank. And taking loan from bank when money is needed.
Also, is the grain bank operation scalable?