Think of the fellow who stops at a rural gas station to fill his tank. As he is pumping the gas, he watches two men working along the roadside. One man digs a hole 2 or 3 feet deep and then moves on. The other man comes along and fills the holes.
The man who has been watching heads toward the men. "Hold it, hold it," he says to them. "Can you tell me what's going on here with this digging?"
"Well, we work for the county, planting trees," one of the men says.
"But one of you is digging a hole and the other fills it up. You're not accomplishing anything. Aren't you wasting the county's money?"
"You don't understand, Mister," one of the men says, leaning on his shovel and wiping his brow. "Normally there are three of us; me, Rodney and Mike. I dig the hole, Rodney sticks in the tree and Mike puts the dirt back. Now just because Rodney's sick, that don't mean that Mike and me can't work."