>it's too easy

To be honest, in my country I can also transfer all my liquid money (not countings stocks etc) with just my phone. The difference is that i'm not afraid of being kidnapped (it's safe here). And anyway, how much does normal person hold in the cash account? People living month-to-month don't have much anyway, while people with savings usually keep them in stocks/bonds/etc.

That is simply not true. I know people who can have millions in their cash account. Also sometimes you need to liquidate your money and put it in cash account, for example down payment for an upcoming home purchase.