You didn’t read the article, did you? It doesn’t say anything about replacing the current financial system with an interest-free one.
Please read the article and if you find anything interesting, discuss. It talks about reforms in the CURRENT financial system and these types of reforms have been suggested by prominent economists as well. If you cannot read the whole article, just read the last paragraph. That is exactly what most of the economists (and perhaps you too) today are saying.
You might disagree with what he says but don’t just go on rambling about someone just because he has ‘maulana’ in his name.
You also need to see if YOU are qualified enough to question someone’s authority in economics or banking.