> All I need to transfer money in the US is a routing number and account number
While this is true, Routing + account numbers are less useful as this information can only be shared with trusted parties because anyone with this information can trigger a debit(!) against your account. For all the other countries I know, the worst anyone can do is deposit money into your account.
I'm curious where you got this bit of information? All I need to transfer money in the US is a routing number and account number.