Being a deflationary currency is bad for business,
A common misconception. The obvious reasoning is something along the lines of: people will keep their money in their pockets if it's worth more next month. In practice, however, they don't. They need food, rent, cars, gas, paying taxes, holidays, insurance, internet, mobile phones, and tons of other products and services NOW, not next month.
True. Just look at IT industry, or mobile phone, tablet... they are under deflationary economic all the time, and are doing great. Great competition, better products, better prices for consumers...
Banking industry needs that kind of competition.