Re: Pay 'em what they are worth !
The problem is that commission isn't a fixed percentage across the board. It takes the same amount of work to do a $50,000 sale as a $50m sale and a $5,000 sale. So the commission percentage has to vary.
One place I worked had sales droids partitioned into different categories, with different percentages based on the size of deals they were expected to do. Leads were passed to an appropriate sales droid for the size of the lead. If they went above their targets the percentage commission went up for all the sales $ above target. It was fine, until one guy generally doing $5,000-$15,000 sales generated his own lead on a $10m sale, closed it and was owed 50% commission. While this was a US company, the sales droid was UK based, so they had to pay up. He bought a Ferrari and left the company right after they paid out (but did come in and show off the Ferrari).