In his book Free to Choose, Milton Friedman described four ways to spend money.

1. You spend your own money on yourself.
2. You spend your own money on someone else.
3. You spend someone else's money on yourself.
4. You spend someone else's money on someone else.

The graphic shown in the video that displays the four ways to spend money can be viewed at http://freedomchannel.blogspot.com/2008/09/4-ways-to-spend-money-by-milton.htm