[trebor]

Don't forget the satisfaction of helping people! When your widget fills a need, not merely a want, in a company or team, you can feel good at having met that need.

There will always be the slimy, rip-his-granny-off kind of salesman because people are like that. However, the flat-pay system would reward the good kind of salesman more often than the bad kind, and would bolster friendly competition within the company.