Is virtual coin the answer to email overload?

The sender of an email attaches units of the virtual currency, called a Serio, to messages. The higher the importance, the more Serios you'd attach. The recipient keeps the Serios which were attached to the message, or chooses a value of Serios to return, depending on the perception of the messages importance. The idea being, since the Serio is a commodity, employees and superiors will be more conscious of the amount and frequency of email they send.
Sound complicated? Kinda. A more simple system might involve removing the fingers of co-workers who send too many useless communications. That'll teach 'em.
