The gooberment does not do this sort of thing well. Once such a program is in place, it would immediately be subject to the whims of beauracracy and political correctness. You just know some judge would take only minutes to decide that it is grossly unfair and unConstitutional that little old ladies can get at Trusted Traveler ID, but twenty-year-old Saudi males new to the country and smelling vaguely of cordite can not.
Think Visa Express.
Visas are supposed to be issued through a rigorous screening process, are they not?
The greatest problem with any government-run investigation process is that it is only as effective as the government employee is diligent and honest. Do you really want some rubber-stamping government lifer making these decisions?