It costs more than a penny to make a penny. It takes valuable time to count them out during transactions. When it was first introduced, the penny was worth about $1,347 in current dollars. If you had two pennies to rub together, you could buy an acre of land. Today they cost more than they are worth and have merely become a conduit for the transmission of germs from sweaty palm to sweaty palm. Pennies might even be one of the most pernicious disease vectors, accounting for as much as 41.7% of our health care costs.
Okay - I'm not exactly sure about the past value and just made up the bit about $1,347, the acreage and the health care but the point is, pennies were probably worth something in the past. This is no longer the case.
It is time to eliminate the penny. This would help to lower the prices of commodities (well, at least copper) and would free up cashiers across the nation to engage in more valuable efforts. It is hard to think of a single act that would do more to improve today's economy (but of course that could just be because it is a Saturday and I'm not really trying.)
So, there it is, lying there like a penny on the sidewalk for either of the presidential candidates to reach down and pick up: start rounding all transactions to the nearest nickel and eliminate the penny.