In a nutshell: payment for ideas can defeat the purpose. 

The situation brings to mind one of my favorite parables:

An old woman lived alone on a street where boys played noisily every afternoon. One day, the din became too much, and she called the boys into her house. She told them she liked to listen to them play, but her hearing was failing and she could no longer hear their games. She asked them to come around each day and play noisily in front of her house. If they did, she would give them each a quarter. The youngsters raced back the following day, and they made a tremendous racket playing happily in front of the house. The old woman paid and asked them to return the next day. Again they played and made noise, and again she paid them for it. But this time she gave each boy only 20 cents, explaining that she was running out of money. On the following day, they got only 15 cents each. Furthermore, the old woman told them she would have to reduce the fee to a nickel on the fourth day. The boys then became angry and said they would not be back. It was not worth the effort, they said, to play for only a nickel a day.

Sound familiar? The old woman’s scheme effectively stole from the boys the very thing they loved most to do, what they were in fact doing for free. The moral of the story is pretty clear. If we’re not careful, we can replace a natural motivation with a synthetic one. We can rob creative power from people by attaching a financial reward to ideas.

The story repeats itself all the time. Companies treat employees like a rat in a maze after cheese, by paying for approved ideas and accepted suggestions. They then wonder why they get such low participation. They give no thought to the notion that in order to get a good idea, you need a lot of ideas.

– Mathew E May