Q: How many supply-siders does it take to change a light bulb?
A: None. The darkness will cause the light bulb to change by itself.

Note: Supply-siders were the force behind Reagans early reforms, and their economic theories were just like those of Thatcher (only the Thatcherites were more extreme). They believed that if they shifted the focus of government economic policy to stimulating supply rather than demand, the business cycle would be stopped at an agreeable point and inflation would be permanently whipped. Obviously, it didnt quite work out that way.)