Please, please, don't pay me!

One of the things that frustrates the hell out of me about working with Telcos, is their inability to re-evaluate what they do and view it in today's context.
A recurring statement that is all over the mobile industry is related to mobile operators trying to tempt their Prepaid customers over to Postpaid. This has to be one of the most illogical strategies on the part of the telco! Why do you want to give free credit to your customers and spend a fortune on sending a paper bill, when they clearly want to pay you in advance?
Prepaid is just a different way of paying for your service, you don't change as a customer just because your payment method changes. If people really do change when they switch to Postpaid, then there has to be another, easily solvable, reason why they do.
They might like the typically lower per minute rates for Postpaid?
They might like the fact that they can keep calling even when their balance runs out?
They might like the personal attention (spam)?
I haven't heard a good argument for why prepaid costs more per minute (and don't give me the IN costs one until you've spoken to TIM).
I haven't heard a good reason why you can't set up an auto-top-up mechanism.
I don't know why you can't find out about the customer even though they are Prepaid.
Do banks run around trying to give you a free overdraft facility? Not mine!
Solve the problems on Prepaid, and start moving your postpaid customers over to prepaid.