This one may already have been posted but haven't been folloing the thread and have always liked it. so here goes.
A man rides into town on Friday, Stays 3 days and leaves on Friday.
How is that possible?
You could think of government workers like teenagers. You pay them an allowance, but do you get any work out them? They eat the food, put their feet on the furniture and complain loudly whenever they are unhappy.