It makes sense in PHP. (Thinking in PHP is a terrible thing to do to your mind.)

I believe OP is trying to say: Money is an incentive. But it isn't the only incentive.

(== in php isn't the equality operator insomuch as the 'kinda like' operator.)

May be he was thinking in the good parts of JavaScript

http://www.jslint.com/lint.html#equal

Yes, good link.

Money is a representation for incentive but not an exact representation. The gap between the two, between the model and the real world, is the interesting part.