The always-perspicacious economics professor Walter Williams' latest column contains an excellent explanation of why it is impossible for anyone, no matter how brilliant, to micromanage an economy.  What he says is something wise people know instinctively, but, nevertheless, it's worth a read.  If nothing else, it may provide you with another way to explain the truth contained therein to others.

His piece is titled "Economic miracle" and starts out:

The idea that even the
brightest person or group of bright people, much less the U.S.
Congress, can wisely manage an economy has to be the height of
arrogance and conceit. Why? It is impossible for anyone to possess the
knowledge that would be necessary for such an undertaking. At the risk
of boring you, let's go through a small example that proves such
knowledge is impossible.

Imagine
you are trying to understand a system consisting of six elements. That
means there would be 30, or n(n-1), possible relationships between
these elements. Now suppose each element can be characterized by being
either on or off. That means the number of possible relationships among
those elements grows to the number 2 raised to the 30th power; that's
well over a billion possible relationships among those six elements.

Read the rest here.