How many magicians does it take to change a light bulb?
Depends on what you want to change it into.
How many Psychiatrists does it take to change a light bulb?
Only one, but the bulb has got to really WANT to change or none; the bulb will change itself when it is ready.
How many Federal employees does it take to screw in a light bulb?
Sorry, that item has been cut from the budget!