The ATA (Air Transport Association), which represents US carriers, has said that the TSA's time would be better spent rolling out Secure Flight - expanded computer screening of passengers.
Trusted Traveler is a program supported by the TSA run by a third party provider. Initial tests of the program, run in Orlando, cost passengers $80 to enroll.
I don't see the problem here - it's the TSA's time and money and if it helps them move people through screening faster and more efficiently, why not? Besides, they've tried Secure Flight already and it was almost impossible for them to get past all the privacy issues.