[kibblerok]

DD is practically money in the bank so its any companies ideal payment method.

Extra costs are negligible per individual yet soon mount up across millions of customers.

Not only that, there is manual work done both via counter payments... but extra staff need paying to answer phones and take a payments. Also non DD payers are statistically more likely to be late or default on bills... not saying you are at all, but its the way it is, this then brings about more reminders, and more staff being paid to chase late bills etc.