I think it's important to note that if you're going to offer postal banking services, they could be introduced region by region, or they could be introduced all at once.
Certainly postal banking as it exists in, say, the United Kingdom or France, which are two of the big examples, is profitable for the postal services offering these financial services. The French postal bank, the Banque Postale, is one of the 50 largest banks in the world.
Certainly post offices right now already have computer hookup. There may be one or two that don't, but the vast majority of them have access to the Internet, and this is really what is needed to offer banking services. That's the prime attribute. Obviously, in the past, before that existed, it would have been more difficult, but now, with that, it is not difficult. In the past, they already offered various services. You could buy financial services. You can still buy a postal money order at a post office, for example. They already have mechanisms to deal with money, with funds, etc. Of course, those mechanisms would have to be enhanced, but I don't think that is a particularly difficult thing to do.
Plus, it's important to note that banking is a very prosperous industry. The big six banks in Canada last year made $60 billion in profit, so there's money in banking. There's money in offering services in banking. I think that postal banking would be able to offer services at reasonable rates, and it would be able to do this.
I think this is something that can be delivered. Of course, there would have to be upgrading and training, but it's also possible nowadays to have online specialists to answer questions, etc.