But it sounds more like you're just trolling again because the only kind of interaction you like in a forum is petty bickering. Doesn't really matter which.
Someone who works at a desk can use VOIP to conserve those prepaid minutes, too. After all, services like google voice will ring anywhere; your desk, your prepaid phone, a land line, etc. Sooner or later they'll start billing for it, but I suspect it will be cheap as dirt when they do.
I don't know where you work, but my PC stays at home, and work resources are used for work. I do my voice calls on MY time, not theirs.
No go back through your magical usage, and figure out how much it would cost you to use your phone for more than 1,000SMS messages a month, about 25-30 MMS messages a month, 4GB of web browsing per month, AND ~300 minutes a month PER PHONE. I want to see your answer. Because we both know you will pay a fortune compared to a post-paid plan.