Is the FedEx Cup an exhibit of more control by the US PGA Tour?

The FedEx Cup that starts in the 2007 season on the US PGA Tour is using a point system rather than earnings to separate the hawks from the eagles. Why would the US PGA Tour not look at the money for earnings? Is it because they do not want their individual tournaments increasing the purse of their tournaments to try to make their tournament a different from the other tournaments?